Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 171-180 of 600 questions.
What are the first four terms formed by \(a_n=2n+3\)?
B. (5,7,9,11)
(n=1,2,3,4) रखने पर (5,7,9,11) मिलते हैं। पहले चार पदों के लिए (n=1) से शुरू करें। / Putting (n=1,2,3,4) gives (5,7,9,11). Start with (n=1) for the first four terms.
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What will \(a_4\) be for the rule \(a_n=n^2+2n\)?
C. (24)
(n=4) रखने पर (a_4=42+2(4)=24) है। घात और गुणा दोनों ध्यान से करें। / Putting (n=4), (a_4=42+2(4)=24). Handle the power and multiplication carefully.
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What is the third term formed by \(a_n=50-4n\)?
C. (38)
(n=3) रखने पर \(a_3=50-12=38\) है। घटाव वाले नियम में चिन्ह ध्यान से देखें। / Putting (n=3), \(a_3=50-12=38\). In subtraction rules, check the sign carefully.
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Which sequence is formed by \(a_n=3n^2\)?
B. (3,12,27,48)
(n=1,2,3,4) रखने पर (3,12,27,48) मिलते हैं। \(n^2\) को (3) से गुणा करें। / Putting (n=1,2,3,4) gives (3,12,27,48). Multiply \(n^2\) by (3).
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Which sequence shows the first four terms of \(a_n=2^n+1\)?
B. (3,5,9,17)
\(2^1+1=3\), \(2^2+1=5\), \(2^3+1=9\), \(2^4+1=17\)। घात के बाद (1) जोड़ें। / \(2^1+1=3\), \(2^2+1=5\), \(2^3+1=9\), and \(2^4+1=17\). Add (1) after evaluating the power.
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What is the difference between the (6)th terms of \(2,5,8,11,\ldots\) and \(1,4,7,10,\ldots\)?
B. (1)
पहले क्रम का (6)ठा पद (17) और दूसरे का (16) है। उनका अंतर (1) है। / The (6)th term of the first sequence is (17) and that of the second is (16). Their difference is (1).
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How are the (8)th term of \(10,15,20,\ldots\) and the (8)th term of \(4,9,14,\ldots\) related?
A. पहला (6) अधिक हैThe first is greater by (6)
दोनों क्रमों का अंतर (5) है, इसलिए पदों का अंतर हमेशा (6) रहेगा। (8)वें पदों में भी यही अंतर है। / Both sequences have difference (5), so the term difference always remains (6). The (8)th terms also differ by (6).
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What is the sum of the first (5) terms of \(3,8,13,\ldots\)?
C. (65)
पहले (5) पद (3,8,13,18,23) हैं। इनका योग (65) है। / The first (5) terms are (3,8,13,18,23). Their sum is (65).
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What is the sum of the first (4) terms of \(40,36,32,\ldots\)?
B. (136)
पहले (4) पद (40,36,32,28) हैं। इनका योग (136) है। / The first (4) terms are (40,36,32,28). Their sum is (136).
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Which sequence does not have a common difference?
C. (4,9,16,25)
(4,9,16,25) के अंतर (5,7,9) हैं, जो समान नहीं हैं। समान अंतर जाँचने के लिए लगातार पद घटाएँ। / The differences in (4,9,16,25) are (5,7,9), which are not equal. Subtract consecutive terms to check common difference.
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