अनुक्रम \(3,6,9,12,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,6,9,12,\ldots\)?
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A \(a_n=n+3\)
B \(a_n=2n\)
C \(a_n=3n\)
D \(a_n=3n+1\)
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Correct Answer
C. \(a_n=3n\)
Explanation
Simple Explanation
हर पद (3) का गुणज है, इसलिए \(a_n=3n\) है। परीक्षा में पहले कुछ पदों को (n) से मिलाकर देखें। / Each term is a multiple of (3), so \(a_n=3n\). In exams, match the first few terms with (n).
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अनुक्रम \(5,10,15,20,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(5,10,15,20,\ldots\)?
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A \(a_n=5n\)
B \(a_n=n+5\)
C \(a_n=4n\)
D \(a_n=5n-1\)
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Correct Answer
A. \(a_n=5n\)
Explanation
Simple Explanation
यह (5) के पहाड़े का अनुक्रम है। परीक्षा में गुणज वाले अनुक्रमों में \(a_n=dn\) तुरंत जाँचें। / This is the sequence of multiples of (5). In exams, quickly check \(a_n=dn\) for multiple-based sequences.
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अनुक्रम \(2,4,6,8,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(2,4,6,8,\ldots\)?
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A \(a_n=n\)
B \(a_n=2n\)
C \(a_n=2n+1\)
D \(a_n=n+2\)
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Correct Answer
B. \(a_n=2n\)
Explanation
Simple Explanation
यह सम संख्याओं का अनुक्रम है, इसलिए \(a_n=2n\) है। परीक्षा में सम संख्याओं के लिए (2n) याद रखें। / This is the sequence of even numbers, so \(a_n=2n\). In exams, remember (2n) for even numbers.
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अनुक्रम \(1,3,5,7,\ldots\) का स्पष्ट नियम कौन-सा है?
Which explicit rule represents the sequence \(1,3,5,7,\ldots\)?
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A \(a_n=2n\)
B \(a_n=n+1\)
C \(a_n=2n-1\)
D \(a_n=3n-2\)
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Correct Answer
C. \(a_n=2n-1\)
Explanation
Simple Explanation
यह विषम संख्याओं का अनुक्रम है, इसलिए \(a_n=2n-1\) है। परीक्षा में पहले पद के लिए (n=1) रखकर नियम जाँचें। / This is the sequence of odd numbers, so \(a_n=2n-1\). In exams, check the rule by putting (n=1).
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यदि \(a_n=n^2\) है, तो अनुक्रम के पहले तीन पद क्या होंगे?
If \(a_n=n^2\), what are the first three terms of the sequence?
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A (1,2,3)
B (1,4,9)
C (2,4,6)
D (3,6,9)
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Correct Answer
B. (1,4,9)
Explanation
Simple Explanation
(n=1,2,3) रखने पर (1,4,9) मिलते हैं। परीक्षा में पहले पदों के लिए (n) के छोटे मान रखें। / Putting (n=1,2,3) gives (1,4,9). In exams, use small values of (n) for first terms.
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अनुक्रम \(4,7,10,13,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,7,10,13,\ldots\)?
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A \(a_n=3n+1\)
B \(a_n=4n\)
C \(a_n=3n-1\)
D \(a_n=n+3\)
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Correct Answer
A. \(a_n=3n+1\)
Explanation
Simple Explanation
पहला पद (4) और अंतर (3) है, इसलिए \(a_n=3n+1\) है। परीक्षा में (a_n=a+(n-1)d) का प्रयोग करें। / The first term is (4) and the difference is (3), so \(a_n=3n+1\). In exams, use (a_n=a+(n-1)d).
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यदि \(a_n=4n-2\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=4n-2\), what is the value of \(a_6\)?
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A (20)
B (22)
C (24)
D (26)
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Explanation
Simple Explanation
\(a_6=4\times6-2=22\) है। परीक्षा में गुणा पहले और घटाव बाद में करें। / \(a_6=4\times6-2=22\). In exams, multiply first and subtract afterward.
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अनुक्रम \(10,20,30,40,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(10,20,30,40,\ldots\)?
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A \(a_n=n+10\)
B \(a_n=5n\)
C \(a_n=10n\)
D \(a_n=10n-1\)
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Correct Answer
C. \(a_n=10n\)
Explanation
Simple Explanation
हर पद (10) का गुणज है, इसलिए \(a_n=10n\) है। परीक्षा में गुणजों का अंतर देखकर नियम लिखें। / Each term is a multiple of (10), so \(a_n=10n\). In exams, write the rule by observing the common difference of multiples.
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यदि \(a_n=7n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=7n\), what is the value of \(a_4\)?
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A (21)
B (24)
C (27)
D (28)
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Explanation
Simple Explanation
\(a_4=7\times4=28\) है। परीक्षा में (n) की जगह पद संख्या रखें। / \(a_4=7\times4=28\). In exams, replace (n) with the term number.
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अनुक्रम \(6,11,16,21,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(6,11,16,21,\ldots\)?
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A \(a_n=5n+1\)
B \(a_n=6n\)
C \(a_n=5n-1\)
D \(a_n=n+5\)
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Correct Answer
A. \(a_n=5n+1\)
Explanation
Simple Explanation
पहला पद (6) और अंतर (5) है, इसलिए \(a_n=5n+1\) है। परीक्षा में सूत्र को पहले दो पदों पर जाँचें। / The first term is (6) and the difference is (5), so \(a_n=5n+1\). In exams, check the formula on the first two terms.
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यदि \(a_n=n+9\) है, तो अनुक्रम का पहला पद क्या है?
If \(a_n=n+9\), what is the first term of the sequence?
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A (9)
B (10)
C (11)
D (12)
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Explanation
Simple Explanation
पहले पद के लिए (n=1) रखने पर \(a_1=10\) मिलता है। परीक्षा में पहले पद के लिए हमेशा (n=1) रखें। / For the first term, putting (n=1) gives \(a_1=10\). In exams, always put (n=1) for the first term.
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अनुक्रम \(9,18,27,36,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(9,18,27,36,\ldots\)?
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A \(a_n=8n\)
B \(a_n=n+9\)
C \(a_n=9n\)
D \(a_n=9n+1\)
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Correct Answer
C. \(a_n=9n\)
Explanation
Simple Explanation
यह (9) के गुणजों का अनुक्रम है। परीक्षा में (n)वें गुणज के लिए (kn) लिखें। / This is the sequence of multiples of (9). In exams, write (kn) for the (n)th multiple.
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यदि \(a_n=3n+2\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=3n+2\), what is the value of \(a_3\)?
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A (8)
B (9)
C (10)
D (11)
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Explanation
Simple Explanation
\(a_3=3\times3+2=11\) है। परीक्षा में पद संख्या को सीधे सूत्र में रखें। / \(a_3=3\times3+2=11\). In exams, put the term number directly into the formula.
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अनुक्रम \(7,14,21,28,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(7,14,21,28,\ldots\)?
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A \(a_n=n+7\)
B \(a_n=7n\)
C \(a_n=6n+1\)
D \(a_n=7n-1\)
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Correct Answer
B. \(a_n=7n\)
Explanation
Simple Explanation
हर पद (7) से गुणा करके मिलता है, इसलिए \(a_n=7n\) है। परीक्षा में पहाड़े वाले अनुक्रम जल्दी पहचानें। / Each term is obtained by multiplying by (7), so \(a_n=7n\). In exams, identify table-based sequences quickly.
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यदि \(a_n=2n+5\) है, तो \(a_1\) और \(a_2\) क्या होंगे?
If \(a_n=2n+5\), what are \(a_1\) and \(a_2\)?
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A (7,9)
B (6,8)
C (5,7)
D (8,10)
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Explanation
Simple Explanation
(n=1) और (n=2) रखने पर (7) और (9) मिलते हैं। परीक्षा में पहले दो पद निकालकर नियम की जाँच करें। / Putting (n=1) and (n=2) gives (7) and (9). In exams, find the first two terms to check the rule.
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अनुक्रम \(12,15,18,21,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(12,15,18,21,\ldots\)?
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A \(a_n=3n+12\)
B \(a_n=12n\)
C \(a_n=3n+9\)
D \(a_n=4n+8\)
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Correct Answer
C. \(a_n=3n+9\)
Explanation
Simple Explanation
पहला पद (12) और अंतर (3) है, इसलिए \(a_n=3n+9\) है। परीक्षा में (a+(n-1)d) को सरल करें। / The first term is (12) and the difference is (3), so \(a_n=3n+9\). In exams, simplify (a+(n-1)d).
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यदि \(a_n=6n-1\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=6n-1\), what is the value of \(a_5\)?
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A (25)
B (27)
C (29)
D (31)
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Explanation
Simple Explanation
\(a_5=6\times5-1=29\) है। परीक्षा में अंतिम घटाव को भूलें नहीं। / \(a_5=6\times5-1=29\). In exams, do not forget the final subtraction.
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अनुक्रम \(1,4,9,16,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,4,9,16,\ldots\)?
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A \(a_n=n+1\)
B \(a_n=2n\)
C \(a_n=n^2\)
D \(a_n=3n\)
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Correct Answer
C. \(a_n=n^2\)
Explanation
Simple Explanation
ये पूर्ण वर्ग हैं, इसलिए \(a_n=n^2\) है। परीक्षा में (1,4,9,16) को वर्ग संख्याओं के रूप में पहचानें। / These are perfect squares, so \(a_n=n^2\). In exams, recognize (1,4,9,16) as square numbers.
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यदि \(a_n=n^2+1\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=n^2+1\), what is the value of \(a_4\)?
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A (15)
B (16)
C (17)
D (18)
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Explanation
Simple Explanation
\(a_4=4^2+1=17\) है। परीक्षा में वर्ग निकालकर (1) जोड़ें। / \(a_4=4^2+1=17\). In exams, find the square and then add (1).
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अनुक्रम \(2,5,10,17,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,5,10,17,\ldots\)?
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A \(a_n=n^2+1\)
B \(a_n=2n+1\)
C \(a_n=n^2\)
D \(a_n=3n-1\)
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Correct Answer
A. \(a_n=n^2+1\)
Explanation
Simple Explanation
ये पद \(n^2+1\) से मिलते हैं। परीक्षा में (n=1,2,3) रखकर विकल्प जाँचें। / The terms are obtained from \(n^2+1\). In exams, check options by putting (n=1,2,3).
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अनुक्रम \(9,8,7,6,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(9,8,7,6,\ldots\)?
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A \(a_n=10-n\)
B \(a_n=9+n\)
C \(a_n=n-10\)
D \(a_n=9n\)
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Correct Answer
A. \(a_n=10-n\)
Explanation
Simple Explanation
(n=1) पर (9) और (n=2) पर (8) मिलता है। \(परीक्षा में घटते हुए (1) के अंतर पर (a_n=\)स्थिर-n) सोचें। \(/ At (n=1), it gives (9), and at (n=2), it gives (8). In exams, for a decreasing difference of (1), think (a_n=\)constant-n).
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यदि \(a_n=15-2n\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=15-2n\), what is the value of \(a_5\)?
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A (3)
B (5)
C (7)
D (9)
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Explanation
Simple Explanation
\(a_5=15-10=5\) है। परीक्षा में पहले (2n) का मान निकालें। / \(a_5=15-10=5\). In exams, calculate (2n) first.
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अनुक्रम \(13,11,9,7,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(13,11,9,7,\ldots\)?
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A \(a_n=2n+11\)
B \(a_n=15-2n\)
C \(a_n=13-2n\)
D \(a_n=11+n\)
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Correct Answer
B. \(a_n=15-2n\)
Explanation
Simple Explanation
पहला पद (13) है और अंतर (-2) है, इसलिए \(a_n=15-2n\) है। परीक्षा में घटते अंतर को ऋणात्मक मानें। / The first term is (13) and the difference is (-2), so \(a_n=15-2n\). In exams, treat a decreasing difference as negative.
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यदि \(a_n=2^n\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=2^n\), what is the value of \(a_3\)?
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A (4)
B (6)
C (8)
D (10)
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Explanation
Simple Explanation
\(a_3=2^3=8\) है। परीक्षा में घात वाले सूत्र में घातांक को पद संख्या से बदलें। / \(a_3=2^3=8\). In exams, replace the exponent by the term number in power formulas.
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अनुक्रम \(2,4,8,16,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(2,4,8,16,\ldots\)?
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A \(a_n=2n\)
B \(a_n=n^2\)
C \(a_n=2^n\)
D \(a_n=2^n+1\)
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Correct Answer
C. \(a_n=2^n\)
Explanation
Simple Explanation
प्रत्येक पद (2) की घात है, इसलिए \(a_n=2^n\) है। परीक्षा में गुणोत्तर जैसी वृद्धि को घात से पहचानें। / Each term is a power of (2), so \(a_n=2^n\). In exams, recognize geometric-type growth using powers.
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यदि \(a_n=3^n\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=3^n\), what is the value of \(a_2\)?
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A (6)
B (8)
C (9)
D (12)
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Explanation
Simple Explanation
\(a_2=3^2=9\) है। परीक्षा में आधार और घातांक को अलग पहचानें। / \(a_2=3^2=9\). In exams, identify the base and exponent separately.
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अनुक्रम \(3,9,27,81,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(3,9,27,81,\ldots\)?
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#explicit-rule
#class-9
#easy
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A \(a_n=3n\)
B \(a_n=3^n\)
C \(a_n=n^3\)
D \(a_n=3^n-1\)
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Correct Answer
B. \(a_n=3^n\)
Explanation
Simple Explanation
ये पद (3) की क्रमिक घातें हैं। परीक्षा में (3,9,27) देखकर \(3^n\) जाँचें। / These terms are consecutive powers of (3). In exams, check \(3^n\) when you see (3,9,27).
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यदि \(a_n=n^2-n\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=n^2-n\), what is the value of \(a_5\)?
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#explicit-rule
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A (15)
B (18)
C (20)
D (25)
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Explanation
Simple Explanation
\(a_5=25-5=20\) है। परीक्षा में पहले वर्ग निकालें और फिर (n) घटाएँ। / \(a_5=25-5=20\). In exams, find the square first and then subtract (n).
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अनुक्रम \(0,2,6,12,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(0,2,6,12,\ldots\)?
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A \(a_n=n^2-n\)
B \(a_n=n^2+1\)
C \(a_n=2n\)
D \(a_n=n+2\)
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Correct Answer
A. \(a_n=n^2-n\)
Explanation
Simple Explanation
\(n^2-n\) रखने पर (0,2,6,12) मिलते हैं। परीक्षा में विकल्पों में (n=1,2,3) रखकर मिलान करें। / Using \(n^2-n\) gives (0,2,6,12). In exams, substitute (n=1,2,3) in the options to match.
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यदि \(a_n=4n+3\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=4n+3\), what is the value of \(a_2\)?
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A (9)
B (11)
C (13)
D (15)
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Explanation
Simple Explanation
\(a_2=4\times2+3=11\) है। परीक्षा में (n) की जगह (2) रखकर सरल करें। / \(a_2=4\times2+3=11\). In exams, put (2) in place of (n) and simplify.
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अनुक्रम \(7,11,15,19,\ldots\) के लिए सही नियम कौन-सा है?
Which rule is correct for the sequence \(7,11,15,19,\ldots\)?
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A \(a_n=4n+3\)
B \(a_n=7n\)
C \(a_n=4n-3\)
D \(a_n=n+6\)
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Correct Answer
A. \(a_n=4n+3\)
Explanation
Simple Explanation
पहला पद (7) और अंतर (4) है, इसलिए \(a_n=4n+3\) है। परीक्षा में अंतर को (n) का गुणांक मानें। / The first term is (7) and the difference is (4), so \(a_n=4n+3\). In exams, take the common difference as the coefficient of (n).
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यदि \(a_n=8n-3\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=8n-3\), what is the value of \(a_4\)?
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A (27)
B (29)
C (31)
D (33)
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Explanation
Simple Explanation
\(a_4=8\times4-3=29\) है। परीक्षा में गुणा के बाद ही (3) घटाएँ। / \(a_4=8\times4-3=29\). In exams, subtract (3) only after multiplying.
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अनुक्रम \(5,13,21,29,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(5,13,21,29,\ldots\)?
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A \(a_n=5n\)
B \(a_n=8n-3\)
C \(a_n=8n+3\)
D \(a_n=13n-8\)
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Correct Answer
B. \(a_n=8n-3\)
Explanation
Simple Explanation
अंतर (8) है और (n=1) पर (5) चाहिए, इसलिए \(a_n=8n-3\) है। परीक्षा में पहले पद से स्थिर संख्या निकालें। / The difference is (8), and at (n=1) the value must be (5), so \(a_n=8n-3\). In exams, find the constant using the first term.
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यदि \(a_n=\frac{n}{2}\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=\frac{n}{2}\), what is the value of \(a_6\)?
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A (2)
B (3)
C (4)
D (6)
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Explanation
Simple Explanation
\(a_6=\frac{6}{2}=3\) है। परीक्षा में भिन्न वाले सूत्र में पहले (n) रखें। / \(a_6=\frac{6}{2}=3\). In exams, substitute (n) first in fractional formulas.
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अनुक्रम \(\frac{1}{2},1,\frac{3}{2},2,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(\frac{1}{2},1,\frac{3}{2},2,\ldots\)?
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A \(a_n=n\)
B \(a_n=\frac{n}{2}\)
C \(a_n=2n\)
D \(a_n=n+1\)
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Correct Answer
B. \(a_n=\frac{n}{2}\)
Explanation
Simple Explanation
हर पद (n) का आधा है। परीक्षा में भिन्न अनुक्रम को छोटे (n) मानों से मिलाएँ। / Each term is half of (n). In exams, match fractional sequences using small values of (n).
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अनुक्रम \(2,8,18,32,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,8,18,32,\ldots\)?
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A \(a_n=2n\)
B \(a_n=n^2+1\)
C \(a_n=2n^2\)
D \(a_n=4n\)
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Correct Answer
C. \(a_n=2n^2\)
Explanation
Simple Explanation
ये पद \(2n^2\) से मिलते हैं। परीक्षा में वर्ग वाले विकल्प को पहले तीन पदों पर जाँचें। / These terms come from \(2n^2\). In exams, test the square-based option on the first three terms.
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यदि \(a_n=3n-2\) है, तो कौन-सा पद (13) के बराबर होगा?
If \(a_n=3n-2\), which term will be equal to (13)?
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A (n=3)
B (n=4)
C (n=5)
D (n=6)
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Explanation
Simple Explanation
(3n-2=13) से (n=5) मिलता है। परीक्षा में पद संख्या पूछी जाए तो सूत्र को दिए मान के बराबर रखें। / From (3n-2=13), we get (n=5). In exams, when term number is asked, equate the formula to the given value.
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अनुक्रम \(1,4,7,10,\ldots\) में (16) कौन-सा पद है?
In the sequence \(1,4,7,10,\ldots\), which term is (16)?
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A चौथा पद / (4)th term
B पाँचवाँ पद / (5)th term
C छठा पद / (6)th term
D सातवाँ पद / (7)th term
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Correct Answer
C. छठा पद / (6)th term
Explanation
Simple Explanation
इसका नियम \(a_n=3n-2\) है और (3n-2=16) से (n=6) है। परीक्षा में पहले सामान्य पद बनाकर पद संख्या निकालें। / Its rule is \(a_n=3n-2\), and (3n-2=16) gives (n=6). In exams, form the general term first to find the term number.
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यदि \(a_n=n+4\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=n+4\), what is the value of \(a_7\)?
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A (9)
B (10)
C (11)
D (12)
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Explanation
Simple Explanation
\(a_7=7+4=11\) है। परीक्षा में सरल रैखिक सूत्रों में सीधे प्रतिस्थापन करें। / \(a_7=7+4=11\). In exams, substitute directly in simple linear formulas.
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अनुक्रम \(5,6,7,8,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(5,6,7,8,\ldots\)?
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A \(a_n=n+4\)
B \(a_n=5n\)
C \(a_n=n+5\)
D \(a_n=4n+1\)
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Correct Answer
A. \(a_n=n+4\)
Explanation
Simple Explanation
जब (n=1), तब मान (5) चाहिए, इसलिए \(a_n=n+4\) है। परीक्षा में लगातार संख्याओं में पहले पद से (n) का संबंध देखें। / When (n=1), the value should be (5), so \(a_n=n+4\). In exams, relate (n) to the first term in consecutive-number sequences.
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यदि \(a_n=12n\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=12n\), what is the value of \(a_3\)?
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A (24)
B (30)
C (36)
D (48)
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Explanation
Simple Explanation
\(a_3=12\times3=36\) है। परीक्षा में गुणा तालिका का उपयोग करें। / \(a_3=12\times3=36\). In exams, use the multiplication table.
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अनुक्रम \(12,24,36,48,\ldots\) का स्पष्ट नियम क्या है?
What is the explicit rule of the sequence \(12,24,36,48,\ldots\)?
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A \(a_n=10n+2\)
B \(a_n=12n\)
C \(a_n=n+12\)
D \(a_n=24n\)
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Correct Answer
B. \(a_n=12n\)
Explanation
Simple Explanation
हर पद (12) का गुणज है। परीक्षा में समान गुणजों को \(a_n=kn\) से लिखें। / Every term is a multiple of (12). In exams, write equal multiples as \(a_n=kn\).
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यदि \(a_n=5n+4\) है, तो \(a_1\) का मान क्या होगा?
If \(a_n=5n+4\), what is the value of \(a_1\)?
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A (5)
B (8)
C (9)
D (10)
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Explanation
Simple Explanation
\(a_1=5\times1+4=9\) है। परीक्षा में पहले पद के लिए (n=1) रखें। / \(a_1=5\times1+4=9\). In exams, put (n=1) for the first term.
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अनुक्रम \(9,14,19,24,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(9,14,19,24,\ldots\)?
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A \(a_n=5n+4\)
B \(a_n=9n\)
C \(a_n=5n-4\)
D \(a_n=n+8\)
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Correct Answer
A. \(a_n=5n+4\)
Explanation
Simple Explanation
पहला पद (9) और अंतर (5) है, इसलिए \(a_n=5n+4\) है। परीक्षा में पहले पद से स्थिर भाग निकालें। / The first term is (9) and the difference is (5), so \(a_n=5n+4\). In exams, find the constant part from the first term.
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यदि (a_n=\frac{n(n+1)}{2}) है, तो \(a_4\) का मान क्या होगा?
If (a_n=\frac{n(n+1)}{2}), what is the value of \(a_4\)?
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#explicit-rule
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A (8)
B (10)
C (12)
D (14)
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Explanation
Simple Explanation
\(a_4=\frac{4\times5}{2}=10\) है। परीक्षा में पहले (n(n+1)) निकालें और फिर (2) से भाग दें। / \(a_4=\frac{4\times5}{2}=10\). In exams, first find (n(n+1)) and then divide by (2).
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अनुक्रम \(1,3,6,10,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,3,6,10,\ldots\)?
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A \(a_n=n^2\)
B \(a_n=2n-1\)
C (a_n=\frac{n(n+1)}{2})
D \(a_n=n+2\)
Explanation opens after your attempt
Correct Answer
C. (a_n=\frac{n(n+1)}{2})
Explanation
Simple Explanation
यह त्रिभुज संख्याओं का अनुक्रम है। परीक्षा में (1,3,6,10) देखकर (\frac{n(n+1)}{2}) जाँचें। / This is the sequence of triangular numbers. In exams, check (\frac{n(n+1)}{2}) when you see (1,3,6,10).
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यदि \(a_n=100-5n\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=100-5n\), what is the value of \(a_6\)?
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A (60)
B (65)
C (70)
D (75)
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Explanation
Simple Explanation
\(a_6=100-30=70\) है। परीक्षा में (5n) को सही घटाएँ। / \(a_6=100-30=70\). In exams, subtract (5n) correctly.
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अनुक्रम \(4,16,36,64,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,16,36,64,\ldots\)?
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A \(a_n=2n^2\)
B \(a_n=4n^2\)
C \(a_n=n^2+4\)
D \(a_n=4n\)
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Correct Answer
B. \(a_n=4n^2\)
Explanation
Simple Explanation
ये पद (4) गुना वर्ग संख्याएँ हैं, इसलिए \(a_n=4n^2\) है। परीक्षा में (n=1,2,3) रखकर मिलान करें। / These terms are (4) times square numbers, so \(a_n=4n^2\). In exams, substitute (n=1,2,3) to match.
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यदि \(a_n=2^n-1\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=2^n-1\), what is the value of \(a_4\)?
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A (13)
B (14)
C (15)
D (16)
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Explanation
Simple Explanation
\(a_4=2^4-1=15\) है। परीक्षा में पहले घात निकालें और फिर (1) घटाएँ। / \(a_4=2^4-1=15\). In exams, find the power first and then subtract (1).
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अनुक्रम \(20,17,14,11,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(20,17,14,11,\ldots\)?
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A \(a_n=23-3n\)
B \(a_n=20-3n\)
C \(a_n=3n+17\)
D \(a_n=20+n\)
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Correct Answer
A. \(a_n=23-3n\)
Explanation
Simple Explanation
पहला पद (20) और अंतर (-3) है, इसलिए \(a_n=23-3n\) है। परीक्षा में घटते अनुक्रम में अंतर को ऋणात्मक मानें। / The first term is (20) and the difference is (-3), so \(a_n=23-3n\). In exams, treat the common difference as negative in decreasing sequences.
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अनुक्रम \(4,8,12,16,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,8,12,16,\ldots\)?
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A \(a_n=4n\)
B \(a_n=n+4\)
C \(a_n=3n+1\)
D \(a_n=4n-1\)
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Correct Answer
A. \(a_n=4n\)
Explanation
Simple Explanation
हर पद (4) का गुणज है, इसलिए \(a_n=4n\) है। परीक्षा में गुणज वाले अनुक्रमों को (kn) से जाँचें। / Each term is a multiple of (4), so \(a_n=4n\). In exams, check multiple-based sequences using (kn).
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यदि \(a_n=6n+2\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=6n+2\), what is the value of \(a_3\)?
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#explicit-rule
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#easy
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A (18)
B (20)
C (22)
D (24)
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Explanation
Simple Explanation
\(a_3=6\times3+2=20\) है। परीक्षा में पहले गुणा करें और फिर स्थिर संख्या जोड़ें। / \(a_3=6\times3+2=20\). In exams, multiply first and then add the constant.
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अनुक्रम \(11,22,33,44,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(11,22,33,44,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=10n+1\)
B \(a_n=n+11\)
C \(a_n=11n\)
D \(a_n=22n\)
Explanation opens after your attempt
Correct Answer
C. \(a_n=11n\)
Explanation
Simple Explanation
हर पद (11) का गुणज है, इसलिए \(a_n=11n\) सही है। परीक्षा में समान गुणजों को सीधे पहचानें। / Each term is a multiple of (11), so \(a_n=11n\) is correct. In exams, identify equal multiples directly.
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यदि \(a_n=9n-4\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=9n-4\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (28)
B (30)
C (32)
D (34)
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Explanation
Simple Explanation
\(a_4=9\times4-4=32\) है। परीक्षा में गुणा के बाद घटाव करें। / \(a_4=9\times4-4=32\). In exams, subtract only after multiplying.
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अनुक्रम \(3,8,13,18,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,8,13,18,\ldots\)?
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#explicit-rule
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A \(a_n=5n-2\)
B \(a_n=3n+5\)
C \(a_n=5n+2\)
D \(a_n=8n-5\)
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Correct Answer
A. \(a_n=5n-2\)
Explanation
Simple Explanation
पहला पद (3) और अंतर (5) है, इसलिए \(a_n=5n-2\) है। परीक्षा में अंतर को (n) का गुणांक मानें। / The first term is (3) and the difference is (5), so \(a_n=5n-2\). In exams, take the difference as the coefficient of (n).
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यदि \(a_n=n^2+3\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=n^2+3\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
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A (25)
B (26)
C (27)
D (28)
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Explanation
Simple Explanation
\(a_5=5^2+3=28\) है। परीक्षा में पहले वर्ग निकालें और फिर (3) जोड़ें। / \(a_5=5^2+3=28\). In exams, find the square first and then add (3).
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अनुक्रम \(4,7,12,19,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(4,7,12,19,\ldots\)?
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#explicit-rule
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A \(a_n=2n+2\)
B \(a_n=n^2+3\)
C \(a_n=n^2+2n\)
D \(a_n=3n+1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^2+3\)
Explanation
Simple Explanation
\(n^2+3\) रखने पर (4,7,12,19) मिलते हैं। परीक्षा में विकल्पों में (n=1,2,3) रखकर जाँचें। / Using \(n^2+3\) gives (4,7,12,19). In exams, test options by putting (n=1,2,3).
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यदि \(a_n=14-3n\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=14-3n\), what is the value of \(a_3\)?
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#explicit-rule
#class-9
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A (3)
B (5)
C (7)
D (9)
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Explanation
Simple Explanation
\(a_3=14-9=5\) है। परीक्षा में घटते सूत्र में (3n) को सही घटाएँ। / \(a_3=14-9=5\). In exams, subtract (3n) correctly in a decreasing formula.
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अनुक्रम \(11,8,5,2,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(11,8,5,2,\ldots\)?
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A \(a_n=11-3n\)
B \(a_n=14-3n\)
C \(a_n=3n+8\)
D \(a_n=8-n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=14-3n\)
Explanation
Simple Explanation
(n=1) पर (11) और (n=2) पर (8) मिलता है, इसलिए \(a_n=14-3n\) है। परीक्षा में घटते अंतर को ऋणात्मक समझें। / At (n=1) it gives (11), and at (n=2) it gives (8), so \(a_n=14-3n\). In exams, treat a decreasing difference as negative.
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यदि \(a_n=5^n\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=5^n\), what is the value of \(a_2\)?
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A (10)
B (15)
C (25)
D (50)
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Explanation
Simple Explanation
\(a_2=5^2=25\) है। परीक्षा में आधार और घातांक को अलग पहचानें। / \(a_2=5^2=25\). In exams, identify the base and exponent separately.
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अनुक्रम \(5,25,125,625,\ldots\) के लिए सही नियम कौन-सा है?
Which rule is correct for the sequence \(5,25,125,625,\ldots\)?
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A \(a_n=5n\)
B \(a_n=5^n\)
C \(a_n=n^5\)
D \(a_n=5^n-1\)
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Correct Answer
B. \(a_n=5^n\)
Explanation
Simple Explanation
ये पद (5) की क्रमिक घातें हैं। परीक्षा में (5,25,125) देखकर \(5^n\) जाँचें। / These terms are consecutive powers of (5). In exams, check \(5^n\) when you see (5,25,125).
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यदि \(a_n=3n^2\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=3n^2\), what is the value of \(a_4\)?
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A (36)
B (42)
C (48)
D (54)
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Explanation
Simple Explanation
\(a_4=3\times4^2=48\) है। परीक्षा में वर्ग निकालकर (3) से गुणा करें। / \(a_4=3\times4^2=48\). In exams, square first and then multiply by (3).
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अनुक्रम \(3,12,27,48,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,12,27,48,\ldots\)?
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A \(a_n=3n^2\)
B \(a_n=3n\)
C \(a_n=n^3\)
D \(a_n=4n^2-1\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=3n^2\)
Explanation
Simple Explanation
ये पद \(3n^2\) से मिलते हैं। परीक्षा में वर्ग आधारित नियम को पहले तीन पदों पर जाँचें। / These terms come from \(3n^2\). In exams, test the square-based rule on the first three terms.
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यदि \(a_n=\frac{3n}{2}\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=\frac{3n}{2}\), what is the value of \(a_4\)?
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#explicit-rule
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A (4)
B (5)
C (6)
D (8)
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Explanation
Simple Explanation
\(a_4=\frac{3\times4}{2}=6\) है। परीक्षा में भिन्न को सरल करके उत्तर दें। / \(a_4=\frac{3\times4}{2}=6\). In exams, simplify the fraction before answering.
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अनुक्रम \(\frac{3}{2},3,\frac{9}{2},6,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(\frac{3}{2},3,\frac{9}{2},6,\ldots\)?
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A \(a_n=\frac{n}{3}\)
B \(a_n=\frac{3n}{2}\)
C \(a_n=2n\)
D \(a_n=3n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=\frac{3n}{2}\)
Explanation
Simple Explanation
हर पद \(\frac{3}{2}\) का अगला गुणज है। परीक्षा में भिन्न गुणजों को (kn) के रूप में लिखें। / Each term is the next multiple of \(\frac{3}{2}\). In exams, write fractional multiples as (kn).
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यदि \(a_n=2n-3\) है, तो कौन-सा पद (15) के बराबर होगा?
If \(a_n=2n-3\), which term will be equal to (15)?
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A (n=7)
B (n=8)
C (n=9)
D (n=10)
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Explanation
Simple Explanation
(2n-3=15) से (n=9) मिलता है। परीक्षा में पद संख्या पूछी जाए तो सूत्र को दिए मान के बराबर रखें। / From (2n-3=15), we get (n=9). In exams, equate the formula to the given value when term number is asked.
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अनुक्रम \(-1,1,3,5,\ldots\) में (15) कौन-सा पद है?
In the sequence \(-1,1,3,5,\ldots\), which term is (15)?
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A सातवाँ पद / (7)th term
B आठवाँ पद / (8)th term
C नौवाँ पद / (9)th term
D दसवाँ पद / (10)th term
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Correct Answer
C. नौवाँ पद / (9)th term
Explanation
Simple Explanation
इसका नियम \(a_n=2n-3\) है और (2n-3=15) से (n=9) है। परीक्षा में पहले सामान्य पद बनाकर पद संख्या निकालें। / Its rule is \(a_n=2n-3\), and (2n-3=15) gives (n=9). In exams, form the general term first to find the term number.
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यदि \(a_n=n^3\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=n^3\), what is the value of \(a_3\)?
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#explicit-rule
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A (9)
B (18)
C (27)
D (36)
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Explanation
Simple Explanation
\(a_3=3^3=27\) है। परीक्षा में घन निकालते समय संख्या को तीन बार गुणा करें। / \(a_3=3^3=27\). In exams, multiply the number three times when finding a cube.
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अनुक्रम \(1,8,27,64,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,8,27,64,\ldots\)?
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A \(a_n=n^2\)
B \(a_n=n^3\)
C \(a_n=3n\)
D \(a_n=2^n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^3\)
Explanation
Simple Explanation
ये पूर्ण घन हैं, इसलिए \(a_n=n^3\) है। परीक्षा में (1,8,27,64) को घन संख्याओं के रूप में पहचानें। / These are perfect cubes, so \(a_n=n^3\). In exams, recognize (1,8,27,64) as cube numbers.
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यदि \(a_n=n^3+1\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=n^3+1\), what is the value of \(a_2\)?
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#explicit-rule
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A (7)
B (8)
C (9)
D (10)
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Explanation
Simple Explanation
\(a_2=2^3+1=9\) है। परीक्षा में पहले घन निकालें और फिर (1) जोड़ें। / \(a_2=2^3+1=9\). In exams, find the cube first and then add (1).
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अनुक्रम \(2,9,28,65,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,9,28,65,\ldots\)?
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A \(a_n=n^2+1\)
B \(a_n=n^3+1\)
C \(a_n=2n+1\)
D \(a_n=3^n-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^3+1\)
Explanation
Simple Explanation
ये पद \(n^3+1\) से मिलते हैं। परीक्षा में (n=1,2,3) रखकर विकल्प जाँचें। / The terms come from \(n^3+1\). In exams, check options using (n=1,2,3).
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यदि \(a_n=20-4n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=20-4n\), what is the value of \(a_4\)?
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A (2)
B (4)
C (6)
D (8)
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Explanation
Simple Explanation
\(a_4=20-16=4\) है। परीक्षा में (4n) निकालकर उसे घटाएँ। / \(a_4=20-16=4\). In exams, calculate (4n) and subtract it.
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अनुक्रम \(16,12,8,4,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(16,12,8,4,\ldots\)?
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A \(a_n=16-4n\)
B \(a_n=20-4n\)
C \(a_n=4n\)
D \(a_n=12-n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=20-4n\)
Explanation
Simple Explanation
(n=1) पर (16) और (n=2) पर (12) मिलता है, इसलिए \(a_n=20-4n\) है। परीक्षा में घटते अनुक्रम में पहला पद मिलाकर नियम जाँचें। / At (n=1) it gives (16), and at (n=2) it gives (12), so \(a_n=20-4n\). In exams, check the rule with the first term in a decreasing sequence.
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यदि \(a_n=7n+1\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=7n+1\), what is the value of \(a_5\)?
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#explicit-rule
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#easy
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A (34)
B (35)
C (36)
D (37)
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Explanation
Simple Explanation
\(a_5=7\times5+1=36\) है। परीक्षा में स्थिर संख्या को अंत में जोड़ें। / \(a_5=7\times5+1=36\). In exams, add the constant at the end.
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अनुक्रम \(8,15,22,29,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(8,15,22,29,\ldots\)?
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A \(a_n=7n+1\)
B \(a_n=8n\)
C \(a_n=7n-1\)
D \(a_n=n+7\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=7n+1\)
Explanation
Simple Explanation
पहला पद (8) और अंतर (7) है, इसलिए \(a_n=7n+1\) है। परीक्षा में पहले पद से स्थिर भाग निकालें। / The first term is (8) and the difference is (7), so \(a_n=7n+1\). In exams, find the constant part from the first term.
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यदि (a_n=\frac{n(n-1)}{2}) है, तो \(a_5\) का मान क्या होगा?
If (a_n=\frac{n(n-1)}{2}), what is the value of \(a_5\)?
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#progressions
#explicit-rule
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#easy
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A (8)
B (10)
C (12)
D (15)
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Explanation
Simple Explanation
\(a_5=\frac{5\times4}{2}=10\) है। परीक्षा में पहले गुणन करें और फिर (2) से भाग दें। / \(a_5=\frac{5\times4}{2}=10\). In exams, multiply first and then divide by (2).
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अनुक्रम \(0,1,3,6,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(0,1,3,6,\ldots\)?
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A (a_n=\frac{n(n+1)}{2})
B (a_n=\frac{n(n-1)}{2})
C \(a_n=n^2-1\)
D \(a_n=n-1\)
Explanation opens after your attempt
Correct Answer
B. (a_n=\frac{n(n-1)}{2})
Explanation
Simple Explanation
(n=1,2,3,4) रखने पर (0,1,3,6) मिलते हैं। परीक्षा में त्रिभुज संख्या जैसे विकल्पों को छोटे (n) से जाँचें। / Putting (n=1,2,3,4) gives (0,1,3,6). In exams, test triangular-number-like options with small (n).
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यदि \(a_n=4n^2-1\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=4n^2-1\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (31)
B (33)
C (35)
D (37)
Explanation opens after your attempt
Explanation
Simple Explanation
\(a_3=4\times9-1=35\) है। परीक्षा में वर्ग के बाद (4) से गुणा करें। / \(a_3=4\times9-1=35\). In exams, square first and then multiply by (4).
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अनुक्रम \(3,15,35,63,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,15,35,63,\ldots\)?
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A \(a_n=4n-1\)
B \(a_n=4n^2-1\)
C \(a_n=n^2+2\)
D \(a_n=3n^2\)
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Correct Answer
B. \(a_n=4n^2-1\)
Explanation
Simple Explanation
\(4n^2-1\) से (3,15,35,63) मिलते हैं। परीक्षा में (n=1,2,3) रखकर मिलान करें। / \(4n^2-1\) gives (3,15,35,63). In exams, substitute (n=1,2,3) and match.
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यदि \(a_n=3n+7\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=3n+7\), what is the value of \(a_6\)?
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A (23)
B (25)
C (27)
D (29)
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Explanation
Simple Explanation
\(a_6=3\times6+7=25\) है। परीक्षा में दिए (n) को सीधे सूत्र में रखें। / \(a_6=3\times6+7=25\). In exams, put the given (n) directly into the formula.
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अनुक्रम \(10,13,16,19,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(10,13,16,19,\ldots\)?
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A \(a_n=10n\)
B \(a_n=3n+7\)
C \(a_n=3n-7\)
D \(a_n=n+9\)
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Correct Answer
B. \(a_n=3n+7\)
Explanation
Simple Explanation
अंतर (3) है और पहला पद (10) है, इसलिए \(a_n=3n+7\) है। परीक्षा में पहले दो पदों पर नियम जाँचें। / The difference is (3) and the first term is (10), so \(a_n=3n+7\). In exams, check the rule on the first two terms.
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यदि \(a_n=2^{n+1}\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=2^{n+1}\), what is the value of \(a_3\)?
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A (8)
B (12)
C (16)
D (32)
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Explanation
Simple Explanation
\(a_3=2^4=16\) है। परीक्षा में पहले घातांक (n+1) निकालें। / \(a_3=2^4=16\). In exams, find the exponent (n+1) first.
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अनुक्रम \(4,8,16,32,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,8,16,32,\ldots\)?
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A \(a_n=2n+2\)
B \(a_n=4n\)
C \(a_n=2^{n+1}\)
D \(a_n=2^n-1\)
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Correct Answer
C. \(a_n=2^{n+1}\)
Explanation
Simple Explanation
\(2^{n+1}\) रखने पर (4,8,16,32) मिलते हैं। परीक्षा में घात वाले विकल्पों को पहले पद से मिलाएँ। / Using \(2^{n+1}\) gives (4,8,16,32). In exams, match power options with the first term.
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यदि \(a_n=n^2+2n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=n^2+2n\), what is the value of \(a_4\)?
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A (20)
B (22)
C (24)
D (26)
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Explanation
Simple Explanation
\(a_4=16+8=24\) है। परीक्षा में वर्ग और (2n) दोनों जोड़ें। / \(a_4=16+8=24\). In exams, add both the square and (2n).
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अनुक्रम \(3,8,15,24,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(3,8,15,24,\ldots\)?
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A \(a_n=n^2+2n\)
B \(a_n=3n\)
C \(a_n=n^2+1\)
D \(a_n=2n^2\)
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Correct Answer
A. \(a_n=n^2+2n\)
Explanation
Simple Explanation
\(n^2+2n\) से (3,8,15,24) मिलते हैं। परीक्षा में बहुपद नियमों को छोटे (n) मानों से जाँचें। / \(n^2+2n\) gives (3,8,15,24). In exams, test polynomial rules with small (n) values.
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यदि \(a_n=50-5n\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=50-5n\), what is the value of \(a_7\)?
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A (10)
B (15)
C (20)
D (25)
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Explanation
Simple Explanation
\(a_7=50-35=15\) है। परीक्षा में (5n) को सही घटाएँ। / \(a_7=50-35=15\). In exams, subtract (5n) correctly.
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अनुक्रम \(45,40,35,30,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(45,40,35,30,\ldots\)?
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A \(a_n=45-5n\)
B \(a_n=50-5n\)
C \(a_n=5n+40\)
D \(a_n=40-n\)
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Correct Answer
B. \(a_n=50-5n\)
Explanation
Simple Explanation
(n=1) पर (45) और (n=2) पर (40) मिलता है, इसलिए \(a_n=50-5n\) है। परीक्षा में घटते समान अंतर का नियम बनाते समय (n=1) जरूर जाँचें। / At (n=1), it gives (45), and at (n=2), it gives (40), so \(a_n=50-5n\). In exams, always check (n=1) when forming a decreasing rule.
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यदि \(a_n=6n-5\) है, तो कौन-सा पद (31) के बराबर होगा?
If \(a_n=6n-5\), which term will be equal to (31)?
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A (n=4)
B (n=5)
C (n=6)
D (n=7)
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Explanation
Simple Explanation
(6n-5=31) से (n=6) मिलता है। परीक्षा में दिए पद को सूत्र के बराबर रखकर हल करें। / From (6n-5=31), we get (n=6). In exams, equate the given term to the formula and solve.
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अनुक्रम \(1,7,13,19,\ldots\) में (31) कौन-सा पद है?
In the sequence \(1,7,13,19,\ldots\), which term is (31)?
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A चौथा पद / (4)th term
B पाँचवाँ पद / (5)th term
C छठा पद / (6)th term
D सातवाँ पद / (7)th term
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Correct Answer
C. छठा पद / (6)th term
Explanation
Simple Explanation
इसका नियम \(a_n=6n-5\) है और (6n-5=31) से (n=6) है। परीक्षा में सामान्य पद बनाकर पद संख्या निकालें। / Its rule is \(a_n=6n-5\), and (6n-5=31) gives (n=6). In exams, form the general term to find the term number.
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यदि \(a_n=\frac{n+1}{2}\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=\frac{n+1}{2}\), what is the value of \(a_5\)?
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A (2)
B (3)
C (4)
D (5)
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Explanation
Simple Explanation
\(a_5=\frac{6}{2}=3\) है। परीक्षा में पहले हर में जाने से पहले अंश को सरल करें। / \(a_5=\frac{6}{2}=3\). In exams, simplify the numerator before dividing by the denominator.
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अनुक्रम \(1,\frac{3}{2},2,\frac{5}{2},\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,\frac{3}{2},2,\frac{5}{2},\ldots\)?
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A \(a_n=\frac{n}{2}\)
B \(a_n=\frac{n+1}{2}\)
C \(a_n=n+1\)
D \(a_n=2n-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=\frac{n+1}{2}\)
Explanation
Simple Explanation
\(\frac{n+1}{2}\) से \(1,\frac{3}{2},2,\frac{5}{2}\) मिलते हैं। परीक्षा में भिन्न पदों को छोटे (n) मानों से मिलाएँ। / \(\frac{n+1}{2}\) gives \(1,\frac{3}{2},2,\frac{5}{2}\). In exams, match fractional terms using small (n) values.
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यदि \(a_n=10n+5\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=10n+5\), what is the value of \(a_2\)?
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A (15)
B (20)
C (25)
D (30)
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Explanation
Simple Explanation
\(a_2=10\times2+5=25\) है। परीक्षा में (n) की जगह पद संख्या रखें। / \(a_2=10\times2+5=25\). In exams, replace (n) with the term number.
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अनुक्रम \(15,25,35,45,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(15,25,35,45,\ldots\)?
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A \(a_n=15n\)
B \(a_n=10n+5\)
C \(a_n=5n+10\)
D \(a_n=10n-5\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=10n+5\)
Explanation
Simple Explanation
पहला पद (15) और अंतर (10) है, इसलिए \(a_n=10n+5\) है। परीक्षा में अंतर को गुणांक और पहले पद से स्थिर भाग निकालें। / The first term is (15) and the difference is (10), so \(a_n=10n+5\). In exams, use the difference as the coefficient and find the constant from the first term.
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यदि \(a_n=2n^2+1\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=2n^2+1\), what is the value of \(a_3\)?
#sequences
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#explicit-rule
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A (17)
B (19)
C (21)
D (23)
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Explanation
Simple Explanation
\(a_3=2\times9+1=19\) है। परीक्षा में वर्ग के बाद (2) से गुणा करें और (1) जोड़ें। / \(a_3=2\times9+1=19\). In exams, square first, multiply by (2), and add (1).
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अनुक्रम \(3,9,19,33,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,9,19,33,\ldots\)?
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A \(a_n=2n^2+1\)
B \(a_n=3n\)
C \(a_n=n^2+2\)
D \(a_n=2^n+1\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=2n^2+1\)
Explanation
Simple Explanation
\(2n^2+1\) रखने पर (3,9,19,33) मिलते हैं। परीक्षा में वर्ग वाले नियम को पहले चार पदों से मिलाएँ। / Using \(2n^2+1\) gives (3,9,19,33). In exams, match the square-based rule with the first four terms.
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यदि \(a_n=3^n-2\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=3^n-2\), what is the value of \(a_3\)?
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#explicit-rule
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A (23)
B (24)
C (25)
D (27)
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Explanation
Simple Explanation
\(a_3=3^3-2=25\) है। परीक्षा में पहले घात निकालें और फिर (2) घटाएँ। / \(a_3=3^3-2=25\). In exams, find the power first and then subtract (2).
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अनुक्रम \(1,7,25,79,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(1,7,25,79,\ldots\)?
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A \(a_n=3^n\)
B \(a_n=3^n-2\)
C \(a_n=2^n-1\)
D \(a_n=n^3-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=3^n-2\)
Explanation
Simple Explanation
\(3^n-2\) से (1,7,25,79) मिलते हैं। परीक्षा में घात वाले विकल्पों में स्थिर घटाव भी जाँचें। / \(3^n-2\) gives (1,7,25,79). In exams, also check constant subtraction in power-based options.
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यदि \(a_n=n^2-2n\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=n^2-2n\), what is the value of \(a_6\)?
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#explicit-rule
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A (18)
B (20)
C (22)
D (24)
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Explanation
Simple Explanation
\(a_6=36-12=24\) है। परीक्षा में वर्ग में से (2n) घटाएँ। / \(a_6=36-12=24\). In exams, subtract (2n) from the square.
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अनुक्रम \(-1,0,3,8,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(-1,0,3,8,\ldots\)?
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A \(a_n=n^2-2n\)
B \(a_n=n^2-1\)
C \(a_n=2n-3\)
D \(a_n=n^2+n\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=n^2-2n\)
Explanation
Simple Explanation
\(n^2-2n\) से (-1,0,3,8) मिलते हैं। परीक्षा में ऋणात्मक पहला पद आने पर भी विकल्पों को जाँचें। / \(n^2-2n\) gives (-1,0,3,8). In exams, keep testing options even when the first term is negative.
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यदि \(a_n=18+n\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=18+n\), what is the value of \(a_5\)?
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#explicit-rule
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A (21)
B (22)
C (23)
D (24)
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Explanation
Simple Explanation
\(a_5=18+5=23\) है। परीक्षा में सरल जोड़ वाले सूत्रों में सीधे प्रतिस्थापन करें। / \(a_5=18+5=23\). In exams, substitute directly in simple addition formulas.
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अनुक्रम \(13,26,39,52,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(13,26,39,52,\ldots\)?
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A \(a_n=13n\)
B \(a_n=n+13\)
C \(a_n=12n+1\)
D \(a_n=26n\)
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Correct Answer
A. \(a_n=13n\)
Explanation
Simple Explanation
हर पद (13) का गुणज है, इसलिए \(a_n=13n\) है। परीक्षा में गुणज वाले अनुक्रम को (kn) से जाँचें। / Each term is a multiple of (13), so \(a_n=13n\). In exams, check multiple-based sequences using (kn).
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यदि \(a_n=12n+1\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=12n+1\), what is the value of \(a_2\)?
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A (23)
B (24)
C (25)
D (26)
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Explanation
Simple Explanation
\(a_2=12\times2+1=25\) है। परीक्षा में पहले गुणा करें और फिर (1) जोड़ें। / \(a_2=12\times2+1=25\). In exams, multiply first and then add (1).
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अनुक्रम \(2,7,12,17,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(2,7,12,17,\ldots\)?
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A \(a_n=5n+2\)
B \(a_n=5n-3\)
C \(a_n=2n+5\)
D \(a_n=7n-5\)
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Correct Answer
B. \(a_n=5n-3\)
Explanation
Simple Explanation
पहला पद (2) और अंतर (5) है, इसलिए \(a_n=5n-3\) है। परीक्षा में (n=1) रखकर पहला पद जरूर जाँचें। / The first term is (2) and the difference is (5), so \(a_n=5n-3\). In exams, always check the first term by putting (n=1).
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यदि \(a_n=8n+6\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=8n+6\), what is the value of \(a_3\)?
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A (28)
B (30)
C (32)
D (34)
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Explanation
Simple Explanation
\(a_3=8\times3+6=30\) है। परीक्षा में पद संख्या को सीधे सूत्र में रखें। / \(a_3=8\times3+6=30\). In exams, put the term number directly into the formula.
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अनुक्रम \(14,20,26,32,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(14,20,26,32,\ldots\)?
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#explicit-rule
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#easy
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A \(a_n=6n+8\)
B \(a_n=14n\)
C \(a_n=6n-8\)
D \(a_n=8n+6\)
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Correct Answer
A. \(a_n=6n+8\)
Explanation
Simple Explanation
अंतर (6) है और पहला पद (14) है, इसलिए \(a_n=6n+8\) है। परीक्षा में अंतर को (n) का गुणांक मानें। / The difference is (6) and the first term is (14), so \(a_n=6n+8\). In exams, take the difference as the coefficient of (n).
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यदि \(a_n=n^2+4\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=n^2+4\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (18)
B (19)
C (20)
D (21)
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Explanation
Simple Explanation
\(a_4=4^2+4=20\) है। परीक्षा में पहले वर्ग निकालें और फिर (4) जोड़ें। / \(a_4=4^2+4=20\). In exams, find the square first and then add (4).
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अनुक्रम \(5,8,13,20,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(5,8,13,20,\ldots\)?
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#explicit-rule
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A \(a_n=2n+3\)
B \(a_n=n^2+4\)
C \(a_n=n^2+3\)
D \(a_n=4n+1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^2+4\)
Explanation
Simple Explanation
\(n^2+4\) रखने पर (5,8,13,20) मिलते हैं। परीक्षा में विकल्पों को (n=1,2,3) से मिलाएँ। / Using \(n^2+4\) gives (5,8,13,20). In exams, match options using (n=1,2,3).
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यदि \(a_n=30-2n\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=30-2n\), what is the value of \(a_7\)?
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#progressions
#explicit-rule
#class-9
#easy
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A (12)
B (14)
C (16)
D (18)
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Explanation
Simple Explanation
\(a_7=30-14=16\) है। परीक्षा में घटते सूत्र में (2n) को सही घटाएँ। / \(a_7=30-14=16\). In exams, subtract (2n) correctly in a decreasing formula.
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अनुक्रम \(28,26,24,22,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(28,26,24,22,\ldots\)?
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#explicit-rule
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A \(a_n=28-2n\)
B \(a_n=30-2n\)
C \(a_n=2n+26\)
D \(a_n=28+n\)
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Correct Answer
B. \(a_n=30-2n\)
Explanation
Simple Explanation
(n=1) पर (28) और (n=2) पर (26) मिलता है, इसलिए \(a_n=30-2n\) है। परीक्षा में घटते अंतर को ऋणात्मक मानें। / At (n=1) it gives (28), and at (n=2) it gives (26), so \(a_n=30-2n\). In exams, treat a decreasing difference as negative.
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यदि \(a_n=4^n\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=4^n\), what is the value of \(a_2\)?
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#progressions
#explicit-rule
#class-9
#easy
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A (8)
B (12)
C (16)
D (20)
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Explanation
Simple Explanation
\(a_2=4^2=16\) है। परीक्षा में आधार और घातांक को अलग पहचानें। / \(a_2=4^2=16\). In exams, identify the base and exponent separately.
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अनुक्रम \(4,16,64,256,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(4,16,64,256,\ldots\)?
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#explicit-rule
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#easy
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A \(a_n=4n\)
B \(a_n=n^4\)
C \(a_n=4^n\)
D \(a_n=4^n-1\)
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Correct Answer
C. \(a_n=4^n\)
Explanation
Simple Explanation
ये पद (4) की क्रमिक घातें हैं। परीक्षा में तेज बढ़ते अनुक्रमों में घात वाले नियम जाँचें। / These terms are consecutive powers of (4). In exams, check power rules in rapidly growing sequences.
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यदि \(a_n=5n^2+2\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=5n^2+2\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (20)
B (22)
C (24)
D (26)
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Explanation
Simple Explanation
\(a_2=5\times4+2=22\) है। परीक्षा में वर्ग निकालकर (5) से गुणा करें। / \(a_2=5\times4+2=22\). In exams, square first and then multiply by (5).
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अनुक्रम \(7,22,47,82,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(7,22,47,82,\ldots\)?
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#explicit-rule
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A \(a_n=5n^2+2\)
B \(a_n=7n\)
C \(a_n=5n+2\)
D \(a_n=2n^2+5\)
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Correct Answer
A. \(a_n=5n^2+2\)
Explanation
Simple Explanation
\(5n^2+2\) से (7,22,47,82) मिलते हैं। परीक्षा में वर्ग आधारित नियमों को छोटे (n) मानों से जाँचें। / \(5n^2+2\) gives (7,22,47,82). In exams, test square-based rules with small (n) values.
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यदि \(a_n=\frac{5n}{2}\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=\frac{5n}{2}\), what is the value of \(a_6\)?
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#progressions
#explicit-rule
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A (10)
B (12)
C (15)
D (18)
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Explanation
Simple Explanation
\(a_6=\frac{5\times6}{2}=15\) है। परीक्षा में भिन्न को सरल करके उत्तर दें। / \(a_6=\frac{5\times6}{2}=15\). In exams, simplify the fraction before answering.
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अनुक्रम \(\frac{5}{2},5,\frac{15}{2},10,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(\frac{5}{2},5,\frac{15}{2},10,\ldots\)?
#sequences
#progressions
#explicit-rule
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A \(a_n=\frac{5n}{2}\)
B \(a_n=\frac{n}{5}\)
C \(a_n=5n\)
D \(a_n=2n+5\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=\frac{5n}{2}\)
Explanation
Simple Explanation
हर पद \(\frac{5}{2}\) का अगला गुणज है। परीक्षा में भिन्न गुणजों को (kn) के रूप में लिखें। / Each term is the next multiple of \(\frac{5}{2}\). In exams, write fractional multiples as (kn).
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यदि \(a_n=4n-7\) है, तो कौन-सा पद (25) के बराबर होगा?
If \(a_n=4n-7\), which term will be equal to (25)?
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A (n=6)
B (n=7)
C (n=8)
D (n=9)
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Explanation
Simple Explanation
(4n-7=25) से (n=8) मिलता है। परीक्षा में पद संख्या पूछी जाए तो सूत्र को दिए मान के बराबर रखें। / From (4n-7=25), we get (n=8). In exams, when the term number is asked, equate the formula to the given value.
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अनुक्रम \(-3,1,5,9,\ldots\) में (25) कौन-सा पद है?
In the sequence \(-3,1,5,9,\ldots\), which term is (25)?
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#explicit-rule
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A छठा पद / (6)th term
B सातवाँ पद / (7)th term
C आठवाँ पद / (8)th term
D नौवाँ पद / (9)th term
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Correct Answer
C. आठवाँ पद / (8)th term
Explanation
Simple Explanation
इसका नियम \(a_n=4n-7\) है और (4n-7=25) से (n=8) है। परीक्षा में पहले सामान्य पद बनाकर पद संख्या निकालें। / Its rule is \(a_n=4n-7\), and (4n-7=25) gives (n=8). In exams, form the general term first to find the term number.
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यदि \(a_n=n^3-1\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=n^3-1\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (24)
B (25)
C (26)
D (27)
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Explanation
Simple Explanation
\(a_3=3^3-1=26\) है। परीक्षा में पहले घन निकालें और फिर (1) घटाएँ। / \(a_3=3^3-1=26\). In exams, find the cube first and then subtract (1).
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अनुक्रम \(0,7,26,63,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(0,7,26,63,\ldots\)?
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#explicit-rule
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#easy
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A \(a_n=n^2-1\)
B \(a_n=n^3-1\)
C \(a_n=3n-3\)
D \(a_n=2^n-2\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^3-1\)
Explanation
Simple Explanation
\(n^3-1\) से (0,7,26,63) मिलते हैं। परीक्षा में घन वाले विकल्पों को पहले चार पदों से मिलाएँ। / \(n^3-1\) gives (0,7,26,63). In exams, match cube-based options with the first four terms.
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यदि \(a_n=2n^3\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=2n^3\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (12)
B (14)
C (16)
D (18)
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Explanation
Simple Explanation
\(a_2=2\times2^3=16\) है। परीक्षा में घन के बाद (2) से गुणा करें। / \(a_2=2\times2^3=16\). In exams, cube first and then multiply by (2).
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अनुक्रम \(2,16,54,128,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(2,16,54,128,\ldots\)?
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#explicit-rule
#class-9
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A \(a_n=2n^3\)
B \(a_n=2n^2\)
C \(a_n=n^3+1\)
D \(a_n=4n^2\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=2n^3\)
Explanation
Simple Explanation
ये पद \(2n^3\) से मिलते हैं। परीक्षा में (n=1,2,3) रखकर नियम जाँचें। / These terms come from \(2n^3\). In exams, check the rule by putting (n=1,2,3).
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यदि \(a_n=40-3n\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=40-3n\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (21)
B (23)
C (25)
D (27)
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Explanation
Simple Explanation
\(a_5=40-15=25\) है। परीक्षा में (3n) को सही घटाएँ। / \(a_5=40-15=25\). In exams, subtract (3n) correctly.
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अनुक्रम \(37,34,31,28,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(37,34,31,28,\ldots\)?
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#explicit-rule
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#easy
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A \(a_n=37-3n\)
B \(a_n=40-3n\)
C \(a_n=3n+34\)
D \(a_n=40+n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=40-3n\)
Explanation
Simple Explanation
(n=1) पर (37) और (n=2) पर (34) मिलता है, इसलिए \(a_n=40-3n\) है। परीक्षा में घटते नियम को पहले पद से जाँचें। / At (n=1) it gives (37), and at (n=2) it gives (34), so \(a_n=40-3n\). In exams, check a decreasing rule with the first term.
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यदि \(a_n=9n+2\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=9n+2\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (36)
B (37)
C (38)
D (39)
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Explanation
Simple Explanation
\(a_4=9\times4+2=38\) है। परीक्षा में स्थिर संख्या को अंत में जोड़ें। / \(a_4=9\times4+2=38\). In exams, add the constant at the end.
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अनुक्रम \(11,20,29,38,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(11,20,29,38,\ldots\)?
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#explicit-rule
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A \(a_n=11n\)
B \(a_n=9n+2\)
C \(a_n=9n-2\)
D \(a_n=2n+9\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=9n+2\)
Explanation
Simple Explanation
पहला पद (11) और अंतर (9) है, इसलिए \(a_n=9n+2\) है। परीक्षा में पहले दो पदों पर नियम जाँचें। / The first term is (11) and the difference is (9), so \(a_n=9n+2\). In exams, check the rule on the first two terms.
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यदि (a_n=\frac{n(n+3)}{2}) है, तो \(a_3\) का मान क्या होगा?
If (a_n=\frac{n(n+3)}{2}), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (7)
B (8)
C (9)
D (10)
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Explanation
Simple Explanation
\(a_3=\frac{3\times6}{2}=9\) है। परीक्षा में पहले (n+3) निकालें और फिर सरल करें। / \(a_3=\frac{3\times6}{2}=9\). In exams, find (n+3) first and then simplify.
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अनुक्रम \(2,5,9,14,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,5,9,14,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=n+1\)
B (a_n=\frac{n(n+3)}{2})
C \(a_n=n^2+1\)
D \(a_n=2n+1\)
Explanation opens after your attempt
Correct Answer
B. (a_n=\frac{n(n+3)}{2})
Explanation
Simple Explanation
(\frac{n(n+3)}{2}) से (2,5,9,14) मिलते हैं। परीक्षा में भिन्न सूत्रों को छोटे (n) मानों से जाँचें। / (\frac{n(n+3)}{2}) gives (2,5,9,14). In exams, test fractional formulas with small (n) values.
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यदि \(a_n=6n^2-2\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=6n^2-2\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (20)
B (22)
C (24)
D (26)
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Explanation
Simple Explanation
\(a_2=6\times4-2=22\) है। परीक्षा में वर्ग के बाद (6) से गुणा करें और (2) घटाएँ। / \(a_2=6\times4-2=22\). In exams, square first, multiply by (6), and subtract (2).
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अनुक्रम \(4,22,52,94,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,22,52,94,\ldots\)?
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#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=6n^2-2\)
B \(a_n=4n\)
C \(a_n=6n-2\)
D \(a_n=2n^2+2\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=6n^2-2\)
Explanation
Simple Explanation
\(6n^2-2\) रखने पर (4,22,52,94) मिलते हैं। परीक्षा में वर्ग वाले नियम को पहले तीन पदों से मिलाएँ। / Using \(6n^2-2\) gives (4,22,52,94). In exams, match the square rule with the first three terms.
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यदि \(a_n=4n+9\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=4n+9\), what is the value of \(a_6\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (31)
B (33)
C (35)
D (37)
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Explanation
Simple Explanation
\(a_6=4\times6+9=33\) है। परीक्षा में दिए (n) को सीधे सूत्र में रखें। / \(a_6=4\times6+9=33\). In exams, put the given (n) directly into the formula.
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अनुक्रम \(13,17,21,25,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(13,17,21,25,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=13n\)
B \(a_n=4n+9\)
C \(a_n=4n-9\)
D \(a_n=n+12\)
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Correct Answer
B. \(a_n=4n+9\)
Explanation
Simple Explanation
अंतर (4) है और पहला पद (13) है, इसलिए \(a_n=4n+9\) है। परीक्षा में अंतर और पहला पद दोनों मिलाएँ। / The difference is (4) and the first term is (13), so \(a_n=4n+9\). In exams, match both the difference and the first term.
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यदि \(a_n=3^{n+1}\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=3^{n+1}\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (18)
B (24)
C (27)
D (30)
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Explanation
Simple Explanation
\(a_2=3^3=27\) है। परीक्षा में पहले घातांक (n+1) निकालें। / \(a_2=3^3=27\). In exams, find the exponent (n+1) first.
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अनुक्रम \(9,27,81,243,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(9,27,81,243,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=9n\)
B \(a_n=3^n\)
C \(a_n=3^{n+1}\)
D \(a_n=n^3\)
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Correct Answer
C. \(a_n=3^{n+1}\)
Explanation
Simple Explanation
\(3^{n+1}\) से (9,27,81,243) मिलते हैं। परीक्षा में पहले पद देखकर घातांक का बदलाव पहचानें। / \(3^{n+1}\) gives (9,27,81,243). In exams, use the first term to identify the exponent shift.
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यदि \(a_n=n^2+3n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=n^2+3n\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (26)
B (28)
C (30)
D (32)
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Explanation
Simple Explanation
\(a_4=16+12=28\) है। परीक्षा में वर्ग और (3n) दोनों जोड़ें। / \(a_4=16+12=28\). In exams, add both the square and (3n).
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अनुक्रम \(4,10,18,28,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(4,10,18,28,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=n^2+3n\)
B \(a_n=4n\)
C \(a_n=n^2+2n\)
D \(a_n=3n+1\)
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Correct Answer
A. \(a_n=n^2+3n\)
Explanation
Simple Explanation
\(n^2+3n\) रखने पर (4,10,18,28) मिलते हैं। परीक्षा में बहुपद नियम को पहले चार पदों से जाँचें। / Using \(n^2+3n\) gives (4,10,18,28). In exams, test the polynomial rule with the first four terms.
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यदि \(a_n=60-6n\) है, तो \(a_8\) का मान क्या होगा?
If \(a_n=60-6n\), what is the value of \(a_8\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (10)
B (12)
C (14)
D (16)
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Explanation
Simple Explanation
\(a_8=60-48=12\) है। परीक्षा में (6n) को सही घटाएँ। / \(a_8=60-48=12\). In exams, subtract (6n) correctly.
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अनुक्रम \(54,48,42,36,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(54,48,42,36,\ldots\)?
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#explicit-rule
#class-9
#easy
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A \(a_n=54-6n\)
B \(a_n=60-6n\)
C \(a_n=6n+48\)
D \(a_n=60+n\)
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Correct Answer
B. \(a_n=60-6n\)
Explanation
Simple Explanation
(n=1) पर (54) और (n=2) पर (48) मिलता है, इसलिए \(a_n=60-6n\) है। परीक्षा में घटते अनुक्रम में (n=1) से नियम जाँचें। / At (n=1) it gives (54), and at (n=2) it gives (48), so \(a_n=60-6n\). In exams, check a decreasing sequence rule using (n=1).
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यदि \(a_n=7n-8\) है, तो कौन-सा पद (41) के बराबर होगा?
If \(a_n=7n-8\), which term will be equal to (41)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (n=5)
B (n=6)
C (n=7)
D (n=8)
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Explanation
Simple Explanation
(7n-8=41) से (n=7) मिलता है। परीक्षा में दिए मान को सूत्र के बराबर रखकर हल करें। / From (7n-8=41), we get (n=7). In exams, equate the given value to the formula and solve.
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अनुक्रम \(-1,6,13,20,\ldots\) में (41) कौन-सा पद है?
In the sequence \(-1,6,13,20,\ldots\), which term is (41)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A पाँचवाँ पद / (5)th term
B छठा पद / (6)th term
C सातवाँ पद / (7)th term
D आठवाँ पद / (8)th term
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Correct Answer
C. सातवाँ पद / (7)th term
Explanation
Simple Explanation
इसका नियम \(a_n=7n-8\) है और (7n-8=41) से (n=7) है। परीक्षा में सामान्य पद से पद संख्या निकालें। / Its rule is \(a_n=7n-8\), and (7n-8=41) gives (n=7). In exams, find the term number from the general term.
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यदि \(a_n=\frac{2n+1}{3}\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=\frac{2n+1}{3}\), what is the value of \(a_4\)?
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#progressions
#explicit-rule
#class-9
#easy
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A (2)
B (3)
C (4)
D (5)
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Explanation
Simple Explanation
\(a_4=\frac{9}{3}=3\) है। परीक्षा में पहले अंश को सरल करें और फिर भाग दें। / \(a_4=\frac{9}{3}=3\). In exams, simplify the numerator first and then divide.
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अनुक्रम \(1,\frac{5}{3},\frac{7}{3},3,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,\frac{5}{3},\frac{7}{3},3,\ldots\)?
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#explicit-rule
#class-9
#easy
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A \(a_n=\frac{n+2}{3}\)
B \(a_n=\frac{2n+1}{3}\)
C \(a_n=2n+1\)
D \(a_n=\frac{3n}{2}\)
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Correct Answer
B. \(a_n=\frac{2n+1}{3}\)
Explanation
Simple Explanation
\(\frac{2n+1}{3}\) से \(1,\frac{5}{3},\frac{7}{3},3\) मिलते हैं। परीक्षा में भिन्न नियमों को छोटे (n) मानों से मिलाएँ। / \(\frac{2n+1}{3}\) gives \(1,\frac{5}{3},\frac{7}{3},3\). In exams, match fractional rules with small (n) values.
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यदि \(a_n=11n+4\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=11n+4\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (35)
B (37)
C (39)
D (41)
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Explanation
Simple Explanation
\(a_3=11\times3+4=37\) है। परीक्षा में गुणा के बाद स्थिर संख्या जोड़ें। / \(a_3=11\times3+4=37\). In exams, multiply first and then add the constant.
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अनुक्रम \(15,26,37,48,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(15,26,37,48,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=15n\)
B \(a_n=11n+4\)
C \(a_n=11n-4\)
D \(a_n=4n+11\)
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Correct Answer
B. \(a_n=11n+4\)
Explanation
Simple Explanation
पहला पद (15) और अंतर (11) है, इसलिए \(a_n=11n+4\) है। परीक्षा में अंतर को गुणांक और पहले पद से स्थिर भाग निकालें। / The first term is (15) and the difference is (11), so \(a_n=11n+4\). In exams, use the difference as coefficient and find the constant from the first term.
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यदि \(a_n=3n^2+2n\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=3n^2+2n\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (29)
B (31)
C (33)
D (35)
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Explanation
Simple Explanation
\(a_3=3\times9+6=33\) है। परीक्षा में वर्ग वाला भाग और रैखिक भाग दोनों जोड़ें। / \(a_3=3\times9+6=33\). In exams, add both the square part and the linear part.
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अनुक्रम \(5,16,33,56,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(5,16,33,56,\ldots\)?
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#explicit-rule
#class-9
#easy
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A \(a_n=3n^2+2n\)
B \(a_n=5n\)
C \(a_n=2n^2+3n\)
D \(a_n=3n+2\)
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Correct Answer
A. \(a_n=3n^2+2n\)
Explanation
Simple Explanation
\(3n^2+2n\) से (5,16,33,56) मिलते हैं। परीक्षा में (n=1,2,3) रखकर मिलान करें। / \(3n^2+2n\) gives (5,16,33,56). In exams, substitute (n=1,2,3) and match.
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यदि \(a_n=2^n+3\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=2^n+3\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (17)
B (18)
C (19)
D (20)
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Explanation
Simple Explanation
\(a_4=2^4+3=19\) है। परीक्षा में पहले घात निकालें और फिर (3) जोड़ें। / \(a_4=2^4+3=19\). In exams, find the power first and then add (3).
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अनुक्रम \(5,7,11,19,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(5,7,11,19,\ldots\)?
#sequences
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#explicit-rule
#class-9
#easy
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A \(a_n=2n+3\)
B \(a_n=2^n+3\)
C \(a_n=n^2+4\)
D \(a_n=3^n+2\)
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Correct Answer
B. \(a_n=2^n+3\)
Explanation
Simple Explanation
\(2^n+3\) से (5,7,11,19) मिलते हैं। परीक्षा में घात वाले विकल्पों में स्थिर जोड़ भी जाँचें। / \(2^n+3\) gives (5,7,11,19). In exams, also check constant addition in power-based options.
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यदि \(a_n=n^2-3n\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=n^2-3n\), what is the value of \(a_7\)?
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#progressions
#explicit-rule
#class-9
#easy
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A (24)
B (26)
C (28)
D (30)
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Explanation
Simple Explanation
\(a_7=49-21=28\) है। परीक्षा में वर्ग में से (3n) घटाएँ। / \(a_7=49-21=28\). In exams, subtract (3n) from the square.
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अनुक्रम \(-2,-2,0,4,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(-2,-2,0,4,\ldots\)?
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#progressions
#explicit-rule
#class-9
#easy
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A \(a_n=n^2-3n\)
B \(a_n=n^2-2\)
C \(a_n=2n-4\)
D \(a_n=n^2+n\)
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Correct Answer
A. \(a_n=n^2-3n\)
Explanation
Simple Explanation
\(n^2-3n\) से (-2,-2,0,4) मिलते हैं। परीक्षा में शून्य या ऋणात्मक पद देखकर नियम को न छोड़ें। / \(n^2-3n\) gives (-2,-2,0,4). In exams, do not reject a rule just because terms are zero or negative.
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यदि \(a_n=25+n\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=25+n\), what is the value of \(a_6\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
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A (29)
B (30)
C (31)
D (32)
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Explanation
Simple Explanation
\(a_6=25+6=31\) है। परीक्षा में सरल जोड़ वाले सूत्रों में सीधे प्रतिस्थापन करें। / \(a_6=25+6=31\). In exams, substitute directly in simple addition formulas.
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