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96 results found for "algebra of sets" in Class 10.

यदि समान्तर श्रेणी में \(a_7=7x-8\), \(a_{15}=15x-48\) और \(a_{23}=23x-88\) हैं, तो \(a_{31}\) क्या होगा?

If in an AP \(a_7=7x-8\), \(a_{15}=15x-48\), and \(a_{23}=23x-88\), what is \(a_{31}\)?

Explanation opens after your attempt
Correct Answer

C. (31x-128)

Step 1

Concept

The group difference of equally spaced terms is (8x-40). \(a_{31}=a_{23}+8x-40=31x-128\).

Step 2

Why this answer is correct

The correct answer is C. (31x-128). The group difference of equally spaced terms is (8x-40). \(a_{31}=a_{23}+8x-40=31x-128\).

Step 3

Exam Tip

समान दूरी वाले पदों का समूह अंतर (8x-40) है। \(a_{31}=a_{23}+8x-40=31x-128\)।

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यदि \(a_{10}=x+31\) और \(a_{27}=x+167\) है, तो \(a_{44}\) (x) के रूप में क्या होगा?

If \(a_{10}=x+31\) and \(a_{27}=x+167\), what is \(a_{44}\) in terms of (x)?

Explanation opens after your attempt
Correct Answer

C. (x+303)

Step 1

Concept

From (17d=136), (d=8). \(a_{44}=x+167+17\times8=x+303\).

Step 2

Why this answer is correct

The correct answer is C. (x+303). From (17d=136), (d=8). \(a_{44}=x+167+17\times8=x+303\).

Step 3

Exam Tip

(17d=136) से (d=8)। \(a_{44}=x+167+17\times8=x+303\)।

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यदि समान्तर श्रेणी में \(a_6=6x-5\), \(a_{13}=13x-33\) और \(a_{20}=20x-61\) हैं, तो \(a_{27}\) क्या होगा?

If in an AP \(a_6=6x-5\), \(a_{13}=13x-33\), and \(a_{20}=20x-61\), what is \(a_{27}\)?

Explanation opens after your attempt
Correct Answer

C. (27x-89)

Step 1

Concept

The group difference of equally spaced terms is (7x-28). \(a_{27}=a_{20}+7x-28=27x-89\).

Step 2

Why this answer is correct

The correct answer is C. (27x-89). The group difference of equally spaced terms is (7x-28). \(a_{27}=a_{20}+7x-28=27x-89\).

Step 3

Exam Tip

समान दूरी वाले पदों का समूह अंतर (7x-28) है। \(a_{27}=a_{20}+7x-28=27x-89\)।

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यदि \(a_9=x+25\) और \(a_{23}=x+109\) है, तो \(a_{41}\) (x) के रूप में क्या होगा?

If \(a_9=x+25\) and \(a_{23}=x+109\), what is \(a_{41}\) in terms of (x)?

Explanation opens after your attempt
Correct Answer

C. (x+217)

Step 1

Concept

(14d=84), so (d=6). \(a_{41}=x+109+18\times6=x+217\).

Step 2

Why this answer is correct

The correct answer is C. (x+217). (14d=84), so (d=6). \(a_{41}=x+109+18\times6=x+217\).

Step 3

Exam Tip

(14d=84), इसलिए (d=6)। \(a_{41}=x+109+18\times6=x+217\)।

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यदि समान्तर श्रेणी में \(a_5=5x-2\), \(a_{11}=11x-20\) और \(a_{17}=17x-38\) हैं, तो \(a_{23}\) क्या होगा?

If in an AP \(a_5=5x-2\), \(a_{11}=11x-20\), and \(a_{17}=17x-38\), what is \(a_{23}\)?

Explanation opens after your attempt
Correct Answer

C. (23x-56)

Step 1

Concept

The group difference of equally spaced terms is (6x-18). \(a_{23}=a_{17}+6x-18=23x-56\).

Step 2

Why this answer is correct

The correct answer is C. (23x-56). The group difference of equally spaced terms is (6x-18). \(a_{23}=a_{17}+6x-18=23x-56\).

Step 3

Exam Tip

समान दूरी वाले पदों का समूह अंतर (6x-18) है। \(a_{23}=a_{17}+6x-18=23x-56\)।

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यदि समान्तर श्रेणी का (8)वां पद (x+19) और (20)वां पद (x+91) है, तो (35)वां पद (x) के रूप में क्या होगा?

If the (8)th term of an AP is (x+19) and the (20)th term is (x+91), what is the (35)th term in terms of (x)?

Explanation opens after your attempt
Correct Answer

C. (x+181)

Step 1

Concept

(12d=72), so (d=6). \(a_{35}=x+91+15\times6=x+181\).

Step 2

Why this answer is correct

The correct answer is C. (x+181). (12d=72), so (d=6). \(a_{35}=x+91+15\times6=x+181\).

Step 3

Exam Tip

(12d=72), इसलिए (d=6)। \(a_{35}=x+91+15\times6=x+181\)।

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यदि समान्तर श्रेणी में \(a_4=4x-1\), \(a_9=9x-16\) और \(a_{14}=14x-31\) हैं तो \(a_{19}\) क्या होगा?

If in an AP \(a_4=4x-1\), \(a_9=9x-16\), and \(a_{14}=14x-31\), what is \(a_{19}\)?

Explanation opens after your attempt
Correct Answer

C. (19x-46)

Step 1

Concept

The group difference for equally spaced terms is (5x-15). \(a_{19}=a_{14}+5x-15=19x-46\).

Step 2

Why this answer is correct

The correct answer is C. (19x-46). The group difference for equally spaced terms is (5x-15). \(a_{19}=a_{14}+5x-15=19x-46\).

Step 3

Exam Tip

समान दूरी पर पदों का समूह अंतर (5x-15) है। \(a_{19}=a_{14}+5x-15=19x-46\)।

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यदि समान्तर श्रेणी का (7)वां पद (x+13) और (18)वां पद (x+90) है तो (32)वां पद (x) के रूप में क्या होगा?

If the (7)th term of an AP is (x+13) and the (18)th term is (x+90), what is the (32)nd term in terms of (x)?

Explanation opens after your attempt
Correct Answer

B. (x+188)

Step 1

Concept

From (11d=77), (d=7). \(a_{32}=a_{18}+14d=x+90+98=x+188\).

Step 2

Why this answer is correct

The correct answer is B. (x+188). From (11d=77), (d=7). \(a_{32}=a_{18}+14d=x+90+98=x+188\).

Step 3

Exam Tip

(11d=77) से (d=7)। \(a_{32}=a_{18}+14d=x+90+98=x+188\)।

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यदि समान्तर श्रेणी में \(a_3=3x-4\), \(a_7=7x-12\) और \(a_{11}=11x-20\) हैं तो \(a_{15}\) क्या होगा?

If in an AP \(a_3=3x-4\), \(a_7=7x-12\), and \(a_{11}=11x-20\), what is \(a_{15}\)?

Explanation opens after your attempt
Correct Answer

C. (15x-28)

Step 1

Concept

The group difference for equally spaced terms is (4x-8). \(a_{15}=a_{11}+4x-8=15x-28\).

Step 2

Why this answer is correct

The correct answer is C. (15x-28). The group difference for equally spaced terms is (4x-8). \(a_{15}=a_{11}+4x-8=15x-28\).

Step 3

Exam Tip

समान दूरी पर पदों का समूह अंतर (4x-8) है। \(a_{15}=a_{11}+4x-8=15x-28\)।

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यदि समान्तर श्रेणी का (6)वां पद (x+11) और (15)वां पद (x+65) है तो (27)वां पद (x) के रूप में क्या होगा?

If the (6)th term of an AP is (x+11) and the (15)th term is (x+65), what is the (27)th term in terms of (x)?

Explanation opens after your attempt
Correct Answer

B. (x+137)

Step 1

Concept

From (9d=54), (d=6). \(a_{27}=a_{15}+12d=x+65+72=x+137\).

Step 2

Why this answer is correct

The correct answer is B. (x+137). From (9d=54), (d=6). \(a_{27}=a_{15}+12d=x+65+72=x+137\).

Step 3

Exam Tip

(9d=54) से (d=6)। \(a_{27}=a_{15}+12d=x+65+72=x+137\)।

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यदि AP में \(a_2=2x+1\), \(a_5=5x-2\) और \(a_8=8x-5\) हैं तो \(a_{11}\) क्या होगा?

If in an AP \(a_2=2x+1\), \(a_5=5x-2\), and \(a_8=8x-5\), what is \(a_{11}\)?

Explanation opens after your attempt
Correct Answer

A. (11x-8)

Step 1

Concept

The given terms are equally spaced, so \(a_8-a_5=3x-3\) is the equal group difference. (a_{11}=a_8+(3x-3)=11x-8).

Step 2

Why this answer is correct

The correct answer is A. (11x-8). The given terms are equally spaced, so \(a_8-a_5=3x-3\) is the equal group difference. (a_{11}=a_8+(3x-3)=11x-8).

Step 3

Exam Tip

दिए गए पद समान दूरी पर हैं इसलिए \(a_8-a_5=3x-3\) समान अंतर समूह है। (a_{11}=a_8+(3x-3)=11x-8)।

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यदि समान्तर श्रेणी का (5)वां पद (x+7) और (12)वां पद (x+42) है तो (20)वां पद (x) के रूप में क्या होगा?

If the (5)th term of an AP is (x+7) and the (12)th term is (x+42), what is the (20)th term in terms of (x)?

Explanation opens after your attempt
Correct Answer

C. (x+82)

Step 1

Concept

From (7d=35), (d=5). \(a_{20}=a_{12}+8d=x+42+40=x+82\).

Step 2

Why this answer is correct

The correct answer is C. (x+82). From (7d=35), (d=5). \(a_{20}=a_{12}+8d=x+42+40=x+82\).

Step 3

Exam Tip

(7d=35) से (d=5)। \(a_{20}=a_{12}+8d=x+42+40=x+82\)।

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यदि \(x^{2}-\frac{1}{x^{2}}=60\) और \(x-\frac{1}{x}=6\), तो \(x+\frac{1}{x}\) का मान क्या है?

If \(x^{2}-\frac{1}{x^{2}}=60\) and \(x-\frac{1}{x}=6\), what is the value of \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

We use (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)). Thus (60=6\left\(x+\frac{1}{x}\right\)), so the value is (10).

Step 2

Why this answer is correct

The correct answer is C. (10). We use (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)). Thus (60=6\left\(x+\frac{1}{x}\right\)), so the value is (10).

Step 3

Exam Tip

(x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)) है। इसलिए (60=6\left\(x+\frac{1}{x}\right\)) और मान (10) है।

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यदि \(x^{2}-\frac{1}{x^{2}}=40\) और \(x-\frac{1}{x}=5\), तो \(x+\frac{1}{x}\) का मान क्या है?

If \(x^{2}-\frac{1}{x^{2}}=40\) and \(x-\frac{1}{x}=5\), what is the value of \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

C. (8)

Step 1

Concept

We use (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)). Thus (40=5\left\(x+\frac{1}{x}\right\)), so the value is (8).

Step 2

Why this answer is correct

The correct answer is C. (8). We use (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)). Thus (40=5\left\(x+\frac{1}{x}\right\)), so the value is (8).

Step 3

Exam Tip

(x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)) है। इसलिए (40=5\left\(x+\frac{1}{x}\right\)), और मान (8) है।

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यदि \(x^{2}-\frac{1}{x^{2}}=24\) और \(x-\frac{1}{x}=4\), तो \(x+\frac{1}{x}\) का मान क्या है?

If \(x^{2}-\frac{1}{x^{2}}=24\) and \(x-\frac{1}{x}=4\), what is the value of \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

Since (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)), (24=4\left\(x+\frac{1}{x}\right\)). In exams, use the difference of squares identity.

Step 2

Why this answer is correct

The correct answer is A. (6). Since (x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)), (24=4\left\(x+\frac{1}{x}\right\)). In exams, use the difference of squares identity.

Step 3

Exam Tip

(x^{2}-\frac{1}{x^{2}}=\left\(x-\frac{1}{x}\right\)\left\(x+\frac{1}{x}\right\)), इसलिए (24=4\left\(x+\frac{1}{x}\right\))। परीक्षा में वर्गों के अंतर की पहचान लगाएं।

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यदि \(x+\frac{1}{x}=5\), तो \(x^{2}+\frac{1}{x^{2}}\) का मान क्या है?

If \(x+\frac{1}{x}=5\), what is the value of \(x^{2}+\frac{1}{x^{2}}\)?

Explanation opens after your attempt
Correct Answer

A. (23)

Step 1

Concept

Since (\left\(x+\frac{1}{x}\right\)^{2}=x^{2}+\frac{1}{x^{2}}+2), we get \(25=x^{2}+\frac{1}{x^{2}}+2\). In exams, use the identity and subtract (2).

Step 2

Why this answer is correct

The correct answer is A. (23). Since (\left\(x+\frac{1}{x}\right\)^{2}=x^{2}+\frac{1}{x^{2}}+2), we get \(25=x^{2}+\frac{1}{x^{2}}+2\). In exams, use the identity and subtract (2).

Step 3

Exam Tip

(\left\(x+\frac{1}{x}\right\)^{2}=x^{2}+\frac{1}{x^{2}}+2), इसलिए \(25=x^{2}+\frac{1}{x^{2}}+2\)। परीक्षा में पहचान लगाकर (2) घटाएं।

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यदि \(a \neq 0\) और \(b \neq 0\), तो (\dfrac{a^{-1}+b^{-1}}{(ab)^{-1}}) का सरल रूप क्या है?

If \(a \neq 0\) and \(b \neq 0\), what is the simplified form of (\dfrac{a^{-1}+b^{-1}}{(ab)^{-1}})?

Explanation opens after your attempt
Correct Answer

A. (,a+b,)

Step 1

Concept

The numerator is \(a^{-1}+b^{-1}=\dfrac{a+b}{ab}\) and the denominator is ((ab)^{-1}=\dfrac{1}{ab}), so the answer is (a+b). In exams, make a common denominator.

Step 2

Why this answer is correct

The correct answer is A. (,a+b,). The numerator is \(a^{-1}+b^{-1}=\dfrac{a+b}{ab}\) and the denominator is ((ab)^{-1}=\dfrac{1}{ab}), so the answer is (a+b). In exams, make a common denominator.

Step 3

Exam Tip

ऊपर \(a^{-1}+b^{-1}=\dfrac{a+b}{ab}\) और नीचे ((ab)^{-1}=\dfrac{1}{ab}), इसलिए उत्तर (a+b) है। परीक्षा में common denominator बनाएं।

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यदि \(y \neq 0\), तो (\(64x^6y^{-3}\)^{\frac{1}{3}}) का सरल रूप क्या है?

If \(y \neq 0\), what is the simplified form of (\(64x^6y^{-3}\)^{\frac{1}{3}})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{4x^2}{y},\)

Step 1

Concept

((64)^{\frac{1}{3}}=4), (\(x^6\)^{\frac{1}{3}}=x-2), and (\(y^{-3}\)^{\frac{1}{3}}=y^{-1}), so the answer is \(\dfrac{4x^2}{y}\). In exams, apply the exponent to each factor.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{4x^2}{y},\). ((64)^{\frac{1}{3}}=4), (\(x^6\)^{\frac{1}{3}}=x-2), and (\(y^{-3}\)^{\frac{1}{3}}=y^{-1}), so the answer is \(\dfrac{4x^2}{y}\). In exams, apply the exponent to each factor.

Step 3

Exam Tip

((64)^{\frac{1}{3}}=4), (\(x^6\)^{\frac{1}{3}}=x-2) और (\(y^{-3}\)^{\frac{1}{3}}=y^{-1}), इसलिए उत्तर \(\dfrac{4x^2}{y}\) है। परीक्षा में प्रत्येक factor पर घात लगाएं।

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यदि \(a \neq 0\) और \(b \neq 0\), तो (\left\(\dfrac{a^2}{b^{-3}}\right\)^{-2}) का सरल रूप क्या होगा?

If \(a \neq 0\) and \(b \neq 0\), what is the simplified form of (\left\(\dfrac{a^2}{b^{-3}}\right\)^{-2})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{1}{a^4b^6},\)

Step 1

Concept

Inside, \(\dfrac{a^2}{b^{-3}}=a^2b^3\), and applying the power (-2) gives \(\dfrac{1}{a^4b^6}\). In exams, simplify the inside part first.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{1}{a^4b^6},\). Inside, \(\dfrac{a^2}{b^{-3}}=a^2b^3\), and applying the power (-2) gives \(\dfrac{1}{a^4b^6}\). In exams, simplify the inside part first.

Step 3

Exam Tip

अंदर \(\dfrac{a^2}{b^{-3}}=a^2b^3\), और (-2) घात लगाने पर \(\dfrac{1}{a^4b^6}\) मिलता है। परीक्षा में अंदर का भाग पहले सरल करें।

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यदि (a>0) और (b>0), तो (\(a^4b^{-2}\)^{\frac{1}{2}}) का सरल रूप क्या है?

If (a>0) and (b>0), what is the simplified form of (\(a^4b^{-2}\)^{\frac{1}{2}})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{a^2}{b},\)

Step 1

Concept

Applying the outside exponent \(\dfrac{1}{2}\) gives \(a^2b^{-1}=\dfrac{a^2}{b}\). In exams, apply the fractional power to every factor.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{a^2}{b},\). Applying the outside exponent \(\dfrac{1}{2}\) gives \(a^2b^{-1}=\dfrac{a^2}{b}\). In exams, apply the fractional power to every factor.

Step 3

Exam Tip

बाहर की घात \(\dfrac{1}{2}\) लगाने पर \(a^2b^{-1}=\dfrac{a^2}{b}\) मिलता है। परीक्षा में fractional power को हर factor पर लगाएं।

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यदि \(a \neq 0\) और \(b \neq 0\), तो (\left\(\dfrac{a^{-2}b}{ab^{-3}}\right\)^{-1}) का सरल रूप क्या है?

If \(a \neq 0\) and \(b \neq 0\), what is the simplified form of (\left\(\dfrac{a^{-2}b}{ab^{-3}}\right\)^{-1})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{a^3}{b^4},\)

Step 1

Concept

The expression inside is \(a^{-3}b^4\), and the power (-1) gives its reciprocal \(\dfrac{a^3}{b^4}\). In exams, apply the outer negative power at the end.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{a^3}{b^4},\). The expression inside is \(a^{-3}b^4\), and the power (-1) gives its reciprocal \(\dfrac{a^3}{b^4}\). In exams, apply the outer negative power at the end.

Step 3

Exam Tip

अंदर का भाग \(a^{-3}b^4\) है, और (-1) घात से उसका व्युत्क्रम \(\dfrac{a^3}{b^4}\) हो जाता है। परीक्षा में outer negative power अंत में लगाएं।

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यदि \(x \neq 0\) और \(y \neq 0\), तो \(\dfrac{x^5y^{-2}}{x^{-1}y^3}\) का सरल रूप क्या है?

If \(x \neq 0\) and \(y \neq 0\), what is the simplified form of \(\dfrac{x^5y^{-2}}{x^{-1}y^3}\)?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{x^6}{y^5},\)

Step 1

Concept

\(x^{5-(-1)}=x^6\) and \(y^{-2-3}=y^{-5}\), so the form is \(\dfrac{x^6}{y^5}\). In exams, simplify the exponent of each variable separately.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{x^6}{y^5},\). \(x^{5-(-1)}=x^6\) and \(y^{-2-3}=y^{-5}\), so the form is \(\dfrac{x^6}{y^5}\). In exams, simplify the exponent of each variable separately.

Step 3

Exam Tip

\(x^{5-(-1)}=x^6\) और \(y^{-2-3}=y^{-5}\), इसलिए रूप \(\dfrac{x^6}{y^5}\) है। परीक्षा में हर variable का exponent अलग-अलग simplify करें।

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यदि \(a \neq 0\) और \(b \neq 0\), तो \(a^2b^{-3}\div a^{-1}b\) का सरल रूप क्या है?

If \(a \neq 0\) and \(b \neq 0\), what is the simplified form of \(a^2b^{-3}\div a^{-1}b\)?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{a^3}{b^4},\)

Step 1

Concept

In division, \(a^{2-(-1)}=a^3\) and \(b^{-3-1}=b^{-4}\), so the answer is \(\dfrac{a^3}{b^4}\). In exams, subtract exponents of like variables separately.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{a^3}{b^4},\). In division, \(a^{2-(-1)}=a^3\) and \(b^{-3-1}=b^{-4}\), so the answer is \(\dfrac{a^3}{b^4}\). In exams, subtract exponents of like variables separately.

Step 3

Exam Tip

भाग में \(a^{2-(-1)}=a^3\) और \(b^{-3-1}=b^{-4}\), इसलिए उत्तर \(\dfrac{a^3}{b^4}\) है। परीक्षा में समान variables के exponents अलग-अलग घटाएं।

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(\(x^{\frac{1}{3}}\)6) का सरल रूप क्या है?

What is the simplified form of (\(x^{\frac{1}{3}}\)6)?

Explanation opens after your attempt
Correct Answer

A. \(,x^2,\)

Step 1

Concept

By the power of a power law, (\(x^{\frac{1}{3}}\)6=x^{\frac{6}{3}}=x-2). In exams, multiply the exponents.

Step 2

Why this answer is correct

The correct answer is A. \(,x^2,\). By the power of a power law, (\(x^{\frac{1}{3}}\)6=x^{\frac{6}{3}}=x-2). In exams, multiply the exponents.

Step 3

Exam Tip

Power of power नियम से (\(x^{\frac{1}{3}}\)6=x^{\frac{6}{3}}=x-2)। परीक्षा में घातों को गुणा करें।

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यदि \(x \neq 0\), तो (\(4x^{-2}\)^{-1}) का सरल रूप क्या है?

If \(x \neq 0\), what is the simplified form of (\(4x^{-2}\)^{-1})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{x^2}{4},\)

Step 1

Concept

(\(4x^{-2}\)^{-1}=4^{-1}x-2=\dfrac{x-2}{4}). In exams, apply the outside exponent to every factor of a product.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{x^2}{4},\). (\(4x^{-2}\)^{-1}=4^{-1}x-2=\dfrac{x-2}{4}). In exams, apply the outside exponent to every factor of a product.

Step 3

Exam Tip

(\(4x^{-2}\)^{-1}=4^{-1}x-2=\dfrac{x-2}{4})। परीक्षा में product के हर factor पर बाहर की घात लगाएं।

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यदि \(y \neq 0\), तो (\left\(\dfrac{x^2}{y^{-1}}\right\)2) का सरल रूप क्या है?

If \(y \neq 0\), what is the simplified form of (\left\(\dfrac{x^2}{y^{-1}}\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(,x^4y^2,\)

Step 1

Concept

\(\dfrac{x^2}{y^{-1}}=x^2y\), so the whole square is \(x^4y^2\). In exams, simplify a negative exponent by moving its position.

Step 2

Why this answer is correct

The correct answer is A. \(,x^4y^2,\). \(\dfrac{x^2}{y^{-1}}=x^2y\), so the whole square is \(x^4y^2\). In exams, simplify a negative exponent by moving its position.

Step 3

Exam Tip

\(\dfrac{x^2}{y^{-1}}=x^2y\), इसलिए पूरा वर्ग \(x^4y^2\) है। परीक्षा में ऋणात्मक घातांक को स्थान बदलकर सरल करें।

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यदि \(x \neq 0\) और \(y \neq 0\), तो (\(x^{-2}y^3\)^{-2}) का सरल रूप कौन सा है?

If \(x \neq 0\) and \(y \neq 0\), which is the simplified form of (\(x^{-2}y^3\)^{-2})?

Explanation opens after your attempt
Correct Answer

A. \(,\dfrac{x^4}{y^6},\)

Step 1

Concept

The outside power (-2) multiplies both exponents, so \(x^4y^{-6}=\dfrac{x^4}{y^6}\). In exams, apply the outside power to every factor inside the bracket.

Step 2

Why this answer is correct

The correct answer is A. \(,\dfrac{x^4}{y^6},\). The outside power (-2) multiplies both exponents, so \(x^4y^{-6}=\dfrac{x^4}{y^6}\). In exams, apply the outside power to every factor inside the bracket.

Step 3

Exam Tip

बाहर की घात (-2) दोनों घातांकों से गुणा होगी, इसलिए \(x^4y^{-6}=\dfrac{x^4}{y^6}\) है। परीक्षा में bracket के बाहर की घात को हर factor पर लगाएं।

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यदि \(y\neq0\) है तो \(y^{-5}\) का सही रूप क्या है?

If \(y\neq0\), what is the correct form of \(y^{-5}\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{1}{y^5}\)

Step 1

Concept

A negative exponent moves the base to the denominator. Therefore \(y^{-5}=\frac{1}{y^5}\).

Step 2

Why this answer is correct

The correct answer is B. \(\frac{1}{y^5}\). A negative exponent moves the base to the denominator. Therefore \(y^{-5}=\frac{1}{y^5}\).

Step 3

Exam Tip

ऋणात्मक घात आधार को हर में ले जाती है। इसलिए \(y^{-5}=\frac{1}{y^5}\) है।

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(\(r^3\)4) का सरल रूप क्या है?

What is the simplified form of (\(r^3\)4)?

Explanation opens after your attempt
Correct Answer

B. \(r^{12}\)

Step 1

Concept

In a power of a power, \(3\cdot4=12\). Hence (\(r^3\)4=r^{12}).

Step 2

Why this answer is correct

The correct answer is B. \(r^{12}\). In a power of a power, \(3\cdot4=12\). Hence (\(r^3\)4=r^{12}).

Step 3

Exam Tip

घात की घात में \(3\cdot4=12\) होता है। इसलिए (\(r^3\)4=r^{12}) है।

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((ab)5) का सही विस्तार क्या है?

What is the correct expansion of ((ab)5)?

Explanation opens after your attempt
Correct Answer

A. \(a^5b^5\)

Step 1

Concept

The power of a product applies to both factors. Hence ((ab)5=a-5b-5).

Step 2

Why this answer is correct

The correct answer is A. \(a^5b^5\). The power of a product applies to both factors. Hence ((ab)5=a-5b-5).

Step 3

Exam Tip

गुणनफल की घात दोनों गुणकों पर लगती है। इसलिए ((ab)5=a-5b-5) है।

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यदि \(x\neq0\) है तो \(x^{-4}\) का सही रूप क्या है?

If \(x\neq0\), what is the correct form of \(x^{-4}\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{1}{x^4}\)

Step 1

Concept

A negative exponent moves the base to the denominator. Therefore \(x^{-4}=\frac{1}{x^4}\).

Step 2

Why this answer is correct

The correct answer is B. \(\frac{1}{x^4}\). A negative exponent moves the base to the denominator. Therefore \(x^{-4}=\frac{1}{x^4}\).

Step 3

Exam Tip

ऋणात्मक घात आधार को हर में ले जाती है। इसलिए \(x^{-4}=\frac{1}{x^4}\) है।

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(\(k^2\)5) का सरल रूप क्या है?

What is the simplified form of (\(k^2\)5)?

Explanation opens after your attempt
Correct Answer

B. \(k^{10}\)

Step 1

Concept

In a power of a power, \(2\cdot5=10\). Therefore (\(k^2\)5=k^{10}).

Step 2

Why this answer is correct

The correct answer is B. \(k^{10}\). In a power of a power, \(2\cdot5=10\). Therefore (\(k^2\)5=k^{10}).

Step 3

Exam Tip

घात की घात में \(2\cdot5=10\) होता है। इसलिए (\(k^2\)5=k^{10}) है।

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((mn)3) का सही विस्तार क्या है?

What is the correct expansion of ((mn)3)?

Explanation opens after your attempt
Correct Answer

A. \(m^3n^3\)

Step 1

Concept

The power of a product applies to both factors. Hence ((mn)3=m-3n-3).

Step 2

Why this answer is correct

The correct answer is A. \(m^3n^3\). The power of a product applies to both factors. Hence ((mn)3=m-3n-3).

Step 3

Exam Tip

गुणनफल की घात दोनों कारकों पर लगती है। इसलिए ((mn)3=m-3n-3) है।

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\(a^{-3}\) का सही रूप क्या है यदि \(a\neq0\)?

What is the correct form of \(a^{-3}\) if \(a\neq0\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{1}{a^3}\)

Step 1

Concept

A negative exponent gives \(a^{-3}=\frac{1}{a^3}\). The negative sign in the exponent does not make the base negative.

Step 2

Why this answer is correct

The correct answer is B. \(\frac{1}{a^3}\). A negative exponent gives \(a^{-3}=\frac{1}{a^3}\). The negative sign in the exponent does not make the base negative.

Step 3

Exam Tip

ऋणात्मक घात में \(a^{-3}=\frac{1}{a^3}\) होता है। घात का ऋण चिह्न आधार को ऋणात्मक नहीं बनाता।

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यदि \(x=1+\sqrt{2}\), तो \(x^3-3x\) का सही मान क्या है?

If \(x=1+\sqrt{2}\), what is the correct value of \(x^3-3x\)?

Explanation opens after your attempt
Correct Answer

A. \(4+2\sqrt{2}\)

Step 1

Concept

\(x^3=7+5\sqrt{2}\) and \(3x=3+3\sqrt{2}\), so the difference is \(4+2\sqrt{2}\). In exams calculate powers step by step.

Step 2

Why this answer is correct

The correct answer is A. \(4+2\sqrt{2}\). \(x^3=7+5\sqrt{2}\) and \(3x=3+3\sqrt{2}\), so the difference is \(4+2\sqrt{2}\). In exams calculate powers step by step.

Step 3

Exam Tip

\(x^3=7+5\sqrt{2}\) और \(3x=3+3\sqrt{2}\), इसलिए अंतर \(4+2\sqrt{2}\) है। परीक्षा में घातों की गणना चरणों में करें।

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यदि \(x=\sqrt{11}-\sqrt{2}\), तो \(x^2\) क्या है?

If \(x=\sqrt{11}-\sqrt{2}\), what is \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(13-2\sqrt{22}\)

Step 1

Concept

\(x^2=11+2-2\sqrt{22}=13-2\sqrt{22}\). In exams do not forget the middle term of ((a-b)2).

Step 2

Why this answer is correct

The correct answer is A. \(13-2\sqrt{22}\). \(x^2=11+2-2\sqrt{22}=13-2\sqrt{22}\). In exams do not forget the middle term of ((a-b)2).

Step 3

Exam Tip

\(x^2=11+2-2\sqrt{22}=13-2\sqrt{22}\) है। परीक्षा में ((a-b)2) का मध्य पद न भूलें।

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यदि \(x=\sqrt{8}-\sqrt{2}\), तो (x) किसके बराबर है?

If \(x=\sqrt{8}-\sqrt{2}\), what is (x) equal to?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{8}-\sqrt{2}=\sqrt{2}\). In exams simplify radicals first.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}\). \(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{8}-\sqrt{2}=\sqrt{2}\). In exams simplify radicals first.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए \(\sqrt{8}-\sqrt{2}=\sqrt{2}\) है। परीक्षा में पहले मूलों को सरल करें।

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यदि \(x=\sqrt{7}+\sqrt{5}\), तो \(x^2\) का सही मान क्या है?

If \(x=\sqrt{7}+\sqrt{5}\), what is the correct value of \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(12+2\sqrt{35}\)

Step 1

Concept

\(x^2=7+5+2\sqrt{35}=12+2\sqrt{35}\). In exams do not miss (2ab) in ((a+b)2).

Step 2

Why this answer is correct

The correct answer is A. \(12+2\sqrt{35}\). \(x^2=7+5+2\sqrt{35}=12+2\sqrt{35}\). In exams do not miss (2ab) in ((a+b)2).

Step 3

Exam Tip

\(x^2=7+5+2\sqrt{35}=12+2\sqrt{35}\) है। परीक्षा में ((a+b)2) में (2ab) न छोड़ें।

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यदि (x) अपरिमेय है, तो (\(x+\sqrt{2}\)-\(x-\sqrt{2}\)) किसके बराबर है?

If (x) is irrational, what is (\(x+\sqrt{2}\)-\(x-\sqrt{2}\)) equal to?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{2}\)

Step 1

Concept

The like (x) terms cancel and the value left is \(2\sqrt{2}\). In exams do not be confused by the type of number during algebraic simplification.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). The like (x) terms cancel and the value left is \(2\sqrt{2}\). In exams do not be confused by the type of number during algebraic simplification.

Step 3

Exam Tip

समान (x) पद कट जाते हैं और मान \(2\sqrt{2}\) बचता है। परीक्षा में बीजीय सरलीकरण में संख्या के प्रकार से भ्रमित न हों।

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यदि \(x=\sqrt{7}-\sqrt{3}\), तो \(x^2\) क्या है?

If \(x=\sqrt{7}-\sqrt{3}\), what is \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(10-2\sqrt{21}\)

Step 1

Concept

\(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\). In exams apply ((a-b)2=a-2+b-2-2ab).

Step 2

Why this answer is correct

The correct answer is A. \(10-2\sqrt{21}\). \(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\). In exams apply ((a-b)2=a-2+b-2-2ab).

Step 3

Exam Tip

\(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\) है। परीक्षा में ((a-b)2=a-2+b-2-2ab) लगाएं।

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किस संख्या का वर्ग \(7+4\sqrt{3}\) है?

Whose square is \(7+4\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{3}\)

Step 1

Concept

(\(2+\sqrt{3}\)2=4+3+4\sqrt{3}=7+4\sqrt{3}). In exams pay attention to the (2ab) term.

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{3}\). (\(2+\sqrt{3}\)2=4+3+4\sqrt{3}=7+4\sqrt{3}). In exams pay attention to the (2ab) term.

Step 3

Exam Tip

(\(2+\sqrt{3}\)2=4+3+4\sqrt{3}=7+4\sqrt{3}) है। परीक्षा में (2ab) वाले पद पर ध्यान दें।

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यदि \(x=\sqrt{6}+\sqrt{2}\), तो \(x^2\) का सही रूप क्या है?

If \(x=\sqrt{6}+\sqrt{2}\), what is the correct form of \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(8+4\sqrt{3}\)

Step 1

Concept

\(x^2=6+2+2\sqrt{12}=8+4\sqrt{3}\). In exams do not forget to simplify \(\sqrt{12}=2\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(8+4\sqrt{3}\). \(x^2=6+2+2\sqrt{12}=8+4\sqrt{3}\). In exams do not forget to simplify \(\sqrt{12}=2\sqrt{3}\).

Step 3

Exam Tip

\(x^2=6+2+2\sqrt{12}=8+4\sqrt{3}\) है। परीक्षा में \(\sqrt{12}=2\sqrt{3}\) सरल करना न भूलें।

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यदि \(x=1-\sqrt{5}\), तो \(x^2-2x-4\) का मान क्या है?

If \(x=1-\sqrt{5}\), what is the value of \(x^2-2x-4\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

Step 2

Why this answer is correct

The correct answer is A. (0). Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

Step 3

Exam Tip

\(x-1=-\sqrt{5}\), इसलिए ((x-1)2=5) से \(x^2-2x-4=0\) मिलता है। परीक्षा में अपरिमेय भाग अलग करके वर्ग करें।

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यदि \(x=\sqrt{3}+\sqrt{2}\), तो (x) किस द्विघात समीकरण को संतुष्ट करता है?

If \(x=\sqrt{3}+\sqrt{2}\), which quadratic equation does (x) satisfy?

Explanation opens after your attempt
Correct Answer

C. \(x^4-10x^2+1=0\)

Step 1

Concept

Here \(x^2=5+2\sqrt{6}\) and then (\(x^2-5\)2=24), so \(x^4-10x^2+1=0\). In exams a sum of two radicals may lead to a fourth-degree relation.

Step 2

Why this answer is correct

The correct answer is C. \(x^4-10x^2+1=0\). Here \(x^2=5+2\sqrt{6}\) and then (\(x^2-5\)2=24), so \(x^4-10x^2+1=0\). In exams a sum of two radicals may lead to a fourth-degree relation.

Step 3

Exam Tip

\(x^2=5+2\sqrt{6}\) और फिर (\(x^2-5\)2=24), इसलिए \(x^4-10x^2+1=0\) है। परीक्षा में दो वर्गमूलों के योग से कभी द्विघात नहीं बल्कि चतुर्थ घात संबंध भी बन सकता है।

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यदि \(x=1+\sqrt{2}\), तो \(x+\frac{1}{x}\) का मान क्या है?

If \(x=1+\sqrt{2}\), what is \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{2}\)

Step 1

Concept

\(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), so the sum is \(2\sqrt{2}\). Rationalising the denominator is a quick exam method.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). \(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), so the sum is \(2\sqrt{2}\). Rationalising the denominator is a quick exam method.

Step 3

Exam Tip

\(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), इसलिए योग \(2\sqrt{2}\) है। परीक्षा में हर का परिमेयकरण तेज तरीका है।

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\(\sqrt{3}\) के प्रमाण में (p=3k) रखने के बाद \(9k^2=3q^2\) मिला। इसे सरल करने का सही तरीका क्या है?

In the proof for \(\sqrt{3}\), after putting (p=3k), \(9k^2=3q^2\) is obtained. What is the correct simplification?

Explanation opens after your attempt
Correct Answer

A. दोनों पक्षों को (3) से भाग देकर \(q^2=3k^2\) पानाDivide both sides by (3) to get \(q^2=3k^2\)

Step 1

Concept

In \(9k^2=3q^2\), the common factor is (3).

Step 2

Why this answer is correct

Dividing by (3) gives \(3k^2=q^2\), that is \(q^2=3k^2\).

Step 3

Exam Tip

Remove only valid common factors while simplifying. चरण 1: \(9k^2=3q^2\) में साझा गुणनखंड (3) है। चरण 2: (3) से भाग देने पर \(3k^2=q^2\), यानी \(q^2=3k^2\) मिलता है। चरण 3: सरलीकरण में केवल वैध समान गुणनखंड हटाएँ।

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\(\sqrt{5}\) के प्रमाण में (a=5k) रखने पर \(25k^2=5b^2\) मिलता है। इससे \(b^2\) क्या होगा?

In the proof for \(\sqrt{5}\), putting (a=5k) gives \(25k^2=5b^2\). What will \(b^2\) be?

Explanation opens after your attempt
Correct Answer

B. \(5k^2\)

Step 1

Concept

Divide both sides of \(25k^2=5b^2\) by (5).

Step 2

Why this answer is correct

We get \(5k^2=b^2\), that is \(b^2=5k^2\).

Step 3

Exam Tip

This gives \(5\mid b^2\) and then \(5\mid b\). चरण 1: \(25k^2=5b^2\) में दोनों पक्षों को (5) से भाग दें। चरण 2: \(5k^2=b^2\), यानी \(b^2=5k^2\)। चरण 3: यही \(5\mid b^2\) और फिर \(5\mid b\) देता है।

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\(\sqrt{2}\) के प्रमाण में (p=2k) रखने के बाद यदि कोई \(q^2=4k^2\) लिखता है, तो सही सुधार क्या होगा?

In the proof for \(\sqrt{2}\), if someone writes \(q^2=4k^2\) after putting (p=2k), what is the correct correction?

Explanation opens after your attempt
Correct Answer

D. \(q^2=2k^2\) होना चाहिएIt should be \(q^2=2k^2\)

Step 1

Concept

Substituting (p=2k) in \(p^2=2q^2\) gives \(4k^2=2q^2\).

Step 2

Why this answer is correct

Dividing both sides by (2) gives \(q^2=2k^2\).

Step 3

Exam Tip

Reduce factors carefully during algebraic simplification. चरण 1: \(p^2=2q^2\) में (p=2k) रखने पर \(4k^2=2q^2\) बनता है। चरण 2: दोनों पक्षों को (2) से भाग देने पर \(q^2=2k^2\) मिलता है। चरण 3: बीजगणितीय सरलीकरण में गुणक ठीक से घटाएँ।

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यदि \(p^2=2q^2\) में (p=2k) रखने पर कोई \(q^2=4k^2\) लिखता है, तो गलती कहाँ है?

If someone writes \(q^2=4k^2\) after putting (p=2k) in \(p^2=2q^2\), where is the mistake?

Explanation opens after your attempt
Correct Answer

A. \(4k^2=2q^2\) को (2) से सही तरह भाग नहीं दिया गया\(4k^2=2q^2\) was not divided correctly by (2)

Step 1

Concept

Putting (p=2k) gives \(4k^2=2q^2\).

Step 2

Why this answer is correct

Dividing both sides by (2) gives \(2k^2=q^2\), that is \(q^2=2k^2\).

Step 3

Exam Tip

A simplification error can spoil the proof. चरण 1: (p=2k) रखने पर \(4k^2=2q^2\) मिलता है। चरण 2: दोनों पक्षों को (2) से भाग देने पर \(2k^2=q^2\), यानी \(q^2=2k^2\) मिलेगा। चरण 3: सरलीकरण की गलती प्रमाण को गलत बना देती है।

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\(\sqrt{5}\) की अपरिमेयता के प्रमाण में (x=5n) रखने के बाद \(25n^2=5y^2\) मिला। अगला सही सरलीकरण क्या है?

In the proof for \(\sqrt{5}\), after putting (x=5n), \(25n^2=5y^2\) is obtained. What is the next correct simplification?

Explanation opens after your attempt
Correct Answer

A. \(y^2=5n^2\)

Step 1

Concept

In \(25n^2=5y^2\), both sides can be divided by (5).

Step 2

Why this answer is correct

This gives \(5n^2=y^2\), that is \(y^2=5n^2\).

Step 3

Exam Tip

While simplifying, remove only the common factor, not the whole (25). चरण 1: \(25n^2=5y^2\) में दोनों पक्ष (5) से भाग दिए जा सकते हैं। चरण 2: इससे \(5n^2=y^2\), अर्थात \(y^2=5n^2\) मिलता है। चरण 3: सरलीकरण में (25) को पूरा नहीं हटाएँ, केवल समान गुणनखंड हटाएँ।

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\(\sqrt{3}\) के प्रमाण में (a=3m) रखने पर \(a^2=3b^2\) किस रूप में बदलेगा?

In the proof for \(\sqrt{3}\), after putting (a=3m), into what form does \(a^2=3b^2\) change?

Explanation opens after your attempt
Correct Answer

A. \(9m^2=3b^2\)

Step 1

Concept

Squaring (a=3m) gives \(a^2=9m^2\).

Step 2

Why this answer is correct

Substituting in \(a^2=3b^2\) gives \(9m^2=3b^2\).

Step 3

Exam Tip

Squaring the coefficient correctly is necessary for the next conclusion. चरण 1: (a=3m) का वर्ग \(a^2=9m^2\) होगा। चरण 2: इसे \(a^2=3b^2\) में रखने पर \(9m^2=3b^2\) मिलता है। चरण 3: गुणांक का वर्ग सही रखना आगे के निष्कर्ष के लिए जरूरी है।

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यदि \(\sqrt{5}\) को परिमेय मानकर \(\sqrt{5}=\frac{x}{y}\) लिखा जाए, तो \(x^2=5y^2\) तक पहुँचने के लिए कौन-सा बीजगणितीय कदम सही है?

If \(\sqrt{5}\) is assumed rational and written as \(\sqrt{5}=\frac{x}{y}\), which algebraic step correctly leads to \(x^2=5y^2\)?

Explanation opens after your attempt
Correct Answer

A. पहले वर्ग करें, फिर दोनों पक्षों को \(y^2\) से गुणा करेंFirst square, then multiply both sides by \(y^2\)

Step 1

Concept

Squaring \(\sqrt{5}=\frac{x}{y}\) gives \(5=\frac{x^2}{y^2}\).

Step 2

Why this answer is correct

Multiplying both sides by \(y^2\) gives \(x^2=5y^2\).

Step 3

Exam Tip

Remember the condition \(y\neq0\) while removing the denominator. चरण 1: \(\sqrt{5}=\frac{x}{y}\) को वर्ग करने पर \(5=\frac{x^2}{y^2}\) मिलता है। चरण 2: दोनों पक्षों को \(y^2\) से गुणा करने पर \(x^2=5y^2\) बनता है। चरण 3: हर हटाते समय \(y\neq0\) की शर्त ध्यान में रखें।

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\(\sqrt{5}\) को परिमेय मानने पर \(p^2=5q^2\) मिलता है। यदि (p=5r), तो कौन-सा सरलीकरण सही है?

Assuming \(\sqrt{5}\) rational gives \(p^2=5q^2\). If (p=5r), which simplification is correct?

Explanation opens after your attempt
Correct Answer

A. \(q^2=5r^2\)

Step 1

Concept

Putting (p=5r) gives \(25r^2=5q^2\).

Step 2

Why this answer is correct

Dividing both sides by (5) gives \(q^2=5r^2\).

Step 3

Exam Tip

Reduce factors correctly during simplification. चरण 1: (p=5r) रखने पर \(25r^2=5q^2\) बनता है। चरण 2: दोनों पक्षों को (5) से भाग देने पर \(q^2=5r^2\) मिलता है। चरण 3: सरलीकरण में गुणक सही घटाएँ।

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\(\sqrt{3}\) के प्रमाण में यदि (p=3r), तो \(p^2\) का सही मान कौन-सा है?

In the proof for \(\sqrt{3}\), if (p=3r), what is the correct value of \(p^2\)?

Explanation opens after your attempt
Correct Answer

A. \(9r^2\)

Step 1

Concept

When squaring (p=3r), both (3) and (r) are squared.

Step 2

Why this answer is correct

Therefore (p-2=(3r)2=9r-2).

Step 3

Exam Tip

Do not forget to square the coefficient, or the proof will go wrong. चरण 1: (p=3r) का वर्ग लेते समय (3) और (r) दोनों का वर्ग होगा। चरण 2: इसलिए (p-2=(3r)2=9r-2)। चरण 3: गुणांक का वर्ग न भूलें, नहीं तो आगे का प्रमाण गलत हो जाएगा।

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\(\sqrt{2}\) की अपरिमेयता के प्रमाण में (p=2r) रखने के बाद कौन-सा समीकरण सही बनता है?

In the proof of irrationality of \(\sqrt{2}\), after putting (p=2r), which equation is correct?

Explanation opens after your attempt
Correct Answer

A. \(q^2=2r^2\)

Step 1

Concept

Put (p=2r) in \(p^2=2q^2\).

Step 2

Why this answer is correct

Then \(4r^2=2q^2\), so \(q^2=2r^2\).

Step 3

Exam Tip

This step completes the proof that (q) is even. चरण 1: \(p^2=2q^2\) में (p=2r) रखें। चरण 2: \(4r^2=2q^2\), इसलिए \(q^2=2r^2\) मिलता है। चरण 3: इस कदम से (q) के सम होने का प्रमाण पूरा होता है।

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\(\sqrt{3}\) के प्रमाण में यदि (p=3k) है, तो \(p^2\) किसके बराबर होगा?

In the proof for \(\sqrt{3}\), if (p=3k), what is \(p^2\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(9k^2\)

Step 1

Concept

Squaring (p=3k) gives (p-2=(3k)2).

Step 2

Why this answer is correct

Therefore \(p^2=9k^2\).

Step 3

Exam Tip

Do not forget to square the coefficient; it leads to \(q^2=3k^2\) next. चरण 1: (p=3k) का वर्ग करने पर (p-2=(3k)2) मिलता है। चरण 2: इसलिए \(p^2=9k^2\) होगा। चरण 3: गुणांक का वर्ग करना न भूलें, यही आगे \(q^2=3k^2\) देता है।

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यदि \(p^2=5q^2\) और \(5\mid p\), तो (p=5k) रखने के बाद \(q^2\) किसके बराबर होगा?

If \(p^2=5q^2\) and \(5\mid p\), after putting (p=5k), what will \(q^2\) equal?

Explanation opens after your attempt
Correct Answer

A. \(5k^2\)

Step 1

Concept

Putting (p=5k) gives \(p^2=25k^2\).

Step 2

Why this answer is correct

Then \(25k^2=5q^2\), so \(q^2=5k^2\).

Step 3

Exam Tip

Simplify algebra carefully, or the proof will break. चरण 1: (p=5k) रखने पर \(p^2=25k^2\) होगा। चरण 2: \(25k^2=5q^2\), इसलिए \(q^2=5k^2\)। चरण 3: बीजगणितीय सरलीकरण ध्यान से करें, वरना प्रमाण टूट जाता है।

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\(\sqrt{2}\) की सिद्धि में \(a^2=2b^2\) से सीधे (a=2b) लिखना किस प्रकार की गलती है?

In the proof of \(\sqrt{2}\), what type of error is directly writing (a=2b) from \(a^2=2b^2\)?

Explanation opens after your attempt
Correct Answer

A. वर्ग समीकरण से गलत मूल समीकरण निकालनाIncorrectly deriving a root-level equation from a squared equation

Step 1

Concept

(a=2b) does not directly follow from \(a^2=2b^2\).

Step 2

Why this answer is correct

The correct conclusion is that \(a^2\) is even and (a) is even.

Step 3

Exam Tip

Do not hastily make a root-level equation from a squared equation. चरण 1: \(a^2=2b^2\) से सीधे (a=2b) नहीं मिलता। चरण 2: सही निष्कर्ष है कि \(a^2\) सम है और (a) सम है। चरण 3: वर्ग समीकरण से जल्दबाजी में मूल समीकरण न बनाएं।

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कौन सा विकल्प \(\sqrt{3}\) की सिद्धि में गलत बीजगणितीय सरलीकरण है?

Which option is a wrong algebraic simplification in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

C. (p=3k) से \(p^2=3k^2\)From (p=3k), \(p^2=3k^2\)

Step 1

Concept

Squaring (p=3k) gives ((3k)2).

Step 2

Why this answer is correct

The correct value is \(9k^2\), not \(3k^2\).

Step 3

Exam Tip

Square the whole expression. चरण 1: (p=3k) को वर्ग करने पर ((3k)2) मिलेगा। चरण 2: सही मान \(9k^2\) है, \(3k^2\) नहीं। चरण 3: वर्ग करते समय पूरी राशि का वर्ग करें।

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\(\sqrt{5}\) की सिद्धि में कौन सा कथन बीजगणितीय रूप से गलत है?

Which statement is algebraically wrong in the proof of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

C. (p=5k) से \(p^2=5k^2\)From (p=5k), \(p^2=5k^2\)

Step 1

Concept

The square of (p=5k) is ((5k)2).

Step 2

Why this answer is correct

((5k)2=25k-2), so writing \(5k^2\) is wrong.

Step 3

Exam Tip

Never forget to square the coefficient. चरण 1: (p=5k) का वर्ग ((5k)2) होगा। चरण 2: ((5k)2=25k-2), इसलिए \(5k^2\) लिखना गलत है। चरण 3: गुणांक का वर्ग करना कभी न भूलें।

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\(\sqrt{3}\) की सिद्धि में (p=3k) रखने पर \(p^2=3q^2\) से कौन सा मध्य समीकरण सही है?

In the proof of \(\sqrt{3}\), after putting (p=3k), which middle equation is correct from \(p^2=3q^2\)?

Explanation opens after your attempt
Correct Answer

A. \(9k^2=3q^2\)

Step 1

Concept

Squaring (p=3k) gives \(p^2=9k^2\).

Step 2

Why this answer is correct

Substitution in \(p^2=3q^2\) gives \(9k^2=3q^2\).

Step 3

Exam Tip

Do not write ((3k)2) as \(3k^2\). चरण 1: (p=3k) का वर्ग करने पर \(p^2=9k^2\) मिलता है। चरण 2: इसे \(p^2=3q^2\) में रखने पर \(9k^2=3q^2\) होगा। चरण 3: ((3k)2) को \(3k^2\) न लिखें।

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यदि \(\sqrt{5}\) की सिद्धि में कोई \(p^2=5q^2\) से (p=5q) लिखता है, तो गलती किस प्रकार की है?

If someone writes (p=5q) from \(p^2=5q^2\) in the proof of \(\sqrt{5}\), what type of error is it?

Explanation opens after your attempt
Correct Answer

A. वर्ग समीकरण से मूल समीकरण गलत तरीके से निकालनाIncorrectly taking a root-level equation from a squared equation

Step 1

Concept

(p=5q) does not directly follow from \(p^2=5q^2\).

Step 2

Why this answer is correct

The correct conclusion is that \(p^2\) is divisible by (5), then (p) is divisible by (5).

Step 3

Exam Tip

Do not hastily derive a root-level equation from a squared equation. चरण 1: \(p^2=5q^2\) से सीधे (p=5q) नहीं मिलता। चरण 2: सही निष्कर्ष है कि \(p^2\) (5) से विभाज्य है और फिर (p) (5) से विभाज्य है। चरण 3: वर्ग समीकरण से जल्दबाजी में मूल समीकरण न निकालें।

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कौन सा विकल्प \(\sqrt{5}\) की सिद्धि में बीजगणितीय गलती दिखाता है?

Which option shows an algebraic mistake in the proof of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. (p=5k) से \(p^2=5k^2\) लिखनाWriting \(p^2=5k^2\) from (p=5k)

Step 1

Concept

Squaring (p=5k) gives ((5k)2).

Step 2

Why this answer is correct

The correct value is \(25k^2\), not \(5k^2\).

Step 3

Exam Tip

Forgetting to square the coefficient can be a major proof error. चरण 1: (p=5k) का वर्ग करने पर ((5k)2) मिलता है। चरण 2: सही मान \(25k^2\) है, \(5k^2\) नहीं। चरण 3: गुणांक का वर्ग भूलना प्रमाण में बड़ी गलती बन सकता है।

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\(\sqrt{3}\) के प्रमाण में (p=3k) रखने पर \(p^2=3q^2\) किस रूप में बदलता है?

In the proof of \(\sqrt{3}\), after putting (p=3k), how does \(p^2=3q^2\) change?

Explanation opens after your attempt
Correct Answer

C. \(9k^2=3q^2\)

Step 1

Concept

Since (p=3k), (p-2=(3k)2).

Step 2

Why this answer is correct

((3k)2=9k-2), so we get \(9k^2=3q^2\).

Step 3

Exam Tip

Always remember to square the coefficient. चरण 1: (p=3k) है, इसलिए (p-2=(3k)2)। चरण 2: ((3k)2=9k-2), अतः \(9k^2=3q^2\) मिलेगा। चरण 3: गुणांक का वर्ग करना हमेशा याद रखें।

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\(\sqrt{3}\) की सिद्धि में यदि (p=3k) है, तो \(p^2\) का सही मान कौन सा है?

In the proof of \(\sqrt{3}\), if (p=3k), what is the correct value of \(p^2\)?

Explanation opens after your attempt
Correct Answer

C. \(9k^2\)

Step 1

Concept

We have (p=3k).

Step 2

Why this answer is correct

Squaring gives (p-2=(3k)2=9k-2).

Step 3

Exam Tip

The coefficient (3) must also be squared to (9). चरण 1: (p=3k) दिया है। चरण 2: वर्ग करने पर (p-2=(3k)2=9k-2)। चरण 3: गुणांक (3) का भी वर्ग (9) करना जरूरी है।

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\(\sqrt{2}\) के प्रमाण में (p=2k) रखने के बाद \(p^2=2q^2\) से कौन सा समीकरण मिलेगा?

In the proof of \(\sqrt{2}\), after putting (p=2k), which equation follows from \(p^2=2q^2\)?

Explanation opens after your attempt
Correct Answer

B. \(4k^2=2q^2\)

Step 1

Concept

If (p=2k), then (p-2=(2k)2=4k-2).

Step 2

Why this answer is correct

Substituting in \(p^2=2q^2\) gives \(4k^2=2q^2\).

Step 3

Exam Tip

Writing ((2k)2) as \(2k^2\) is a common mistake. चरण 1: (p=2k) होने पर (p-2=(2k)2=4k-2)। चरण 2: इसे \(p^2=2q^2\) में रखने पर \(4k^2=2q^2\) मिलता है। चरण 3: ((2k)2) को \(2k^2\) लिखना सामान्य गलती है।

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\(\sqrt{5}\) के प्रमाण में (m=5k) रखने पर \(m^2=5n^2\) से कौन सा समीकरण बनेगा?

In the proof of \(\sqrt{5}\), after putting (m=5k), which equation follows from \(m^2=5n^2\)?

Explanation opens after your attempt
Correct Answer

B. \(25k^2=5n^2\)

Step 1

Concept

If (m=5k), then \(m^2=25k^2\).

Step 2

Why this answer is correct

So \(m^2=5n^2\) becomes \(25k^2=5n^2\).

Step 3

Exam Tip

Writing ((5k)2) as \(5k^2\) is a mistake. चरण 1: (m=5k) रखने पर \(m^2=25k^2\) होगा। चरण 2: इसलिए \(m^2=5n^2\) में \(25k^2=5n^2\) मिलेगा। चरण 3: ((5k)2) को \(5k^2\) लिखना गलती है।

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\(\sqrt{2}\) के प्रमाण में (p=2r) रखने पर \(p^2=2q^2\) किस रूप में बदलेगा?

In the proof of \(\sqrt{2}\), if (p=2r), how does \(p^2=2q^2\) change?

Explanation opens after your attempt
Correct Answer

B. \(4r^2=2q^2\)

Step 1

Concept

Since (p=2r), (p-2=(2r)2=4r-2).

Step 2

Why this answer is correct

Substituting in \(p^2=2q^2\) gives \(4r^2=2q^2\).

Step 3

Exam Tip

Do not forget to square the coefficient. चरण 1: (p=2r) है, इसलिए (p-2=(2r)2=4r-2)। चरण 2: इसे \(p^2=2q^2\) में रखने पर \(4r^2=2q^2\) मिलता है। चरण 3: गुणांक का वर्ग करना न भूलें।

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\(\sqrt{5}\) के प्रमाण में (p=5k) रखने पर \(p^2\) क्या होगा?

In the proof of \(\sqrt{5}\), if (p=5k), what will \(p^2\) be?

Explanation opens after your attempt
Correct Answer

A. \(25k^2\)

Step 1

Concept

Square (p=5k).

Step 2

Why this answer is correct

Since ((5k)2=25k-2), \(p^2=25k^2\).

Step 3

Exam Tip

Do this algebraic step carefully in the proof of \(\sqrt{5}\). चरण 1: (p=5k) को वर्ग करें। चरण 2: ((5k)2=25k-2), इसलिए \(p^2=25k^2\)। चरण 3: \(\sqrt{5}\) के प्रमाण में यह बीजगणितीय चरण बहुत ध्यान से करें।

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\(\sqrt{2}\) के प्रमाण में (p=2k) रखने पर \(p^2\) का सही रूप क्या होगा?

In the proof of \(\sqrt{2}\), if (p=2k), what is the correct form of \(p^2\)?

Explanation opens after your attempt
Correct Answer

C. \(4k^2\)

Step 1

Concept

We have (p=2k).

Step 2

Why this answer is correct

Squaring gives (p-2=(2k)2=4k-2).

Step 3

Exam Tip

Do not forget to square the coefficient. चरण 1: (p=2k) है। चरण 2: वर्ग करने पर (p-2=(2k)2=4k-2) मिलेगा। चरण 3: गुणांक का वर्ग करना न भूलें।

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\(\sqrt{3}\) के प्रमाण में \(9k^2=3b^2\) से क्या सही निष्कर्ष मिलता है?

In the proof of \(\sqrt{3}\), what correct conclusion follows from \(9k^2=3b^2\)?

Explanation opens after your attempt
Correct Answer

A. \(b^2=3k^2\)

Step 1

Concept

Divide both sides of \(9k^2=3b^2\) by (3).

Step 2

Why this answer is correct

We get \(3k^2=b^2\), that is \(b^2=3k^2\).

Step 3

Exam Tip

Then conclude that (b) is divisible by (3). चरण 1: \(9k^2=3b^2\) में दोनों ओर (3) से भाग करें। चरण 2: \(3k^2=b^2\) मिलेगा, यानी \(b^2=3k^2\)। चरण 3: फिर (b) के (3) से विभाज्य होने का निष्कर्ष लें।

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\(\sqrt{5}\) के प्रमाण में (a=5k) रखने पर \(a^2\) का सही मान क्या है?

In the proof of \(\sqrt{5}\), if (a=5k), what is the correct value of \(a^2\)?

Explanation opens after your attempt
Correct Answer

A. \(25k^2\)

Step 1

Concept

We write (a=5k).

Step 2

Why this answer is correct

Squaring gives (a-2=(5k)2=25k-2).

Step 3

Exam Tip

A small algebra mistake can spoil the whole proof. चरण 1: (a=5k) लिखते हैं। चरण 2: वर्ग करने पर (a-2=(5k)2=25k-2)। चरण 3: छोटे बीजगणितीय कदमों में गलती से पूरा प्रमाण बिगड़ सकता है।

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\(\sqrt{2}\) के प्रमाण में (a=2k) रखने पर \(a^2\) का सही मान क्या होगा?

In the proof of \(\sqrt{2}\), if (a=2k), what is the correct value of \(a^2\)?

Explanation opens after your attempt
Correct Answer

A. \(4k^2\)

Step 1

Concept

We have (a=2k).

Step 2

Why this answer is correct

Squaring gives (a-2=(2k)2=4k-2).

Step 3

Exam Tip

Do not forget to square the coefficient also. चरण 1: (a=2k) दिया है। चरण 2: वर्ग करने पर (a-2=(2k)2=4k-2) मिलता है। चरण 3: गुणांक का भी वर्ग करना न भूलें।

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\(\sqrt{2}\) के प्रमाण में (p=2k) रखने के बाद \(p^2\) किसके बराबर होगा?

In the proof of \(\sqrt{2}\), after putting (p=2k), what is \(p^2\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(4k^2\)

Step 1

Concept

(p=2k).

Step 2

Why this answer is correct

Squaring gives (p-2=(2k)2=4k-2).

Step 3

Exam Tip

Writing ((2k)2) as \(2k^2\) is a common mistake. चरण 1: (p=2k) है। चरण 2: दोनों ओर वर्ग करने पर (p-2=(2k)2=4k-2)। चरण 3: ((2k)2) को \(2k^2\) लिखना आम गलती है।

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\(\sqrt{5}\) के प्रमाण में (p=5k) रखने के बाद \(p^2\) किसके बराबर होगा?

In the proof of \(\sqrt{5}\), after putting (p=5k), what is \(p^2\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(25k^2\)

Step 1

Concept

We have (p=5k).

Step 2

Why this answer is correct

Squaring gives (p-2=(5k)2=25k-2).

Step 3

Exam Tip

Do this simplification carefully in the proof of \(\sqrt{5}\). चरण 1: (p=5k) दिया है। चरण 2: वर्ग करने पर (p-2=(5k)2=25k-2)। चरण 3: \(\sqrt{5}\) के प्रमाण में यह सरलीकरण ध्यान से करें।

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\(\sqrt{3}\) के प्रमाण में (p=3k) रखने के बाद \(p^2\) किसके बराबर होगा?

In the proof of \(\sqrt{3}\), after putting (p=3k), what is \(p^2\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(9k^2\)

Step 1

Concept

(p=3k).

Step 2

Why this answer is correct

Squaring gives (p-2=(3k)2=9k-2).

Step 3

Exam Tip

Do not forget to square the coefficient also. चरण 1: (p=3k) है। चरण 2: वर्ग करने पर (p-2=(3k)2=9k-2)। चरण 3: गुणांक का भी वर्ग करना न भूलें।

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यदि \(x=\sqrt{7}+2\), तो ((x-2)(x+2)) का मान क्या है?

If \(x=\sqrt{7}+2\), what is the value of ((x-2)(x+2))?

Explanation opens after your attempt
Correct Answer

A. \(7+4\sqrt{7}\)

Step 1

Concept

((x-2)=\sqrt{7}) and ((x+2)=\sqrt{7}+4).

Step 2

Why this answer is correct

The product is (\sqrt{7}\(\sqrt{7}+4\)=7+4\sqrt{7}).

Step 3

Exam Tip

Before applying an identity directly, substitute the given value of (x) carefully. चरण 1: ((x-2)=\sqrt{7}) और ((x+2)=\sqrt{7}+4)। चरण 2: गुणन (\sqrt{7}\(\sqrt{7}+4\)=7+4\sqrt{7}) है। चरण 3: सीधे सूत्र लगाने से पहले (x) का दिया हुआ मान ध्यान से रखें।

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यदि \(x=\sqrt{3}+\sqrt{2}\), तो \(x^4-10x^2+1\) का मान क्या है?

If \(x=\sqrt{3}+\sqrt{2}\), what is the value of \(x^4-10x^2+1\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

\(x^2=5+2\sqrt{6}\).

Step 2

Why this answer is correct

Using the identity \(x^2+\frac{1}{x^2}=10\), we get \(x^4-10x^2+1=0\).

Step 3

Exam Tip

In such questions, recognize the relation between (x) and its conjugate reciprocal. चरण 1: \(x^2=5+2\sqrt{6}\) है। चरण 2: \(x^2+\frac{1}{x^2}=10\) की पहचान से \(x^4-10x^2+1=0\) मिलता है। चरण 3: ऐसे प्रश्नों में (x) और उसके संयुग्मी व्युत्क्रम का संबंध पहचानें।

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यदि \(a=1+\sqrt{5}\), तो \(a^2-2a\) का मान क्या है?

If \(a=1+\sqrt{5}\), what is the value of \(a^2-2a\)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

(a-2-2a=a(a-2)).

Step 2

Why this answer is correct

\(a-2=\sqrt{5}-1\), so (a(a-2)=\(1+\sqrt{5}\)\(\sqrt{5}-1\)=4).

Step 3

Exam Tip

Recognizing the hidden conjugate form is a quick method. चरण 1: (a-2-2a=a(a-2)) है। चरण 2: \(a-2=\sqrt{5}-1\), इसलिए (a(a-2)=\(1+\sqrt{5}\)\(\sqrt{5}-1\)=4)। चरण 3: छिपे हुए संयुग्मी रूप को पहचानना तेज तरीका है।

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यदि \(x=\sqrt{2}\), तो \(x^4-4x^2+4\) का मान क्या है?

If \(x=\sqrt{2}\), what is the value of \(x^4-4x^2+4\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

\(x^2=2\).

Step 2

Why this answer is correct

Therefore (x-4=\(x^2\)2=4), and the value is (4-8+4=0).

Step 3

Exam Tip

For powers of a surd, first find \(x^2\). चरण 1: \(x^2=2\) है। चरण 2: इसलिए (x-4=\(x^2\)2=4), और मान (4-8+4=0) है। चरण 3: मूल वाली संख्या पर घात लगाते समय पहले \(x^2\) निकालें।

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यदि \(x=\sqrt{3}-1\), तो ((x+1)2) का मान क्या है?

If \(x=\sqrt{3}-1\), what is the value of ((x+1)2)?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

\(x+1=\sqrt{3}\).

Step 2

Why this answer is correct

Therefore ((x+1)2=\(\sqrt{3}\)2=3).

Step 3

Exam Tip

Simplify the inner expression first, then square it. चरण 1: \(x+1=\sqrt{3}\) है। चरण 2: इसलिए ((x+1)2=\(\sqrt{3}\)2=3)। चरण 3: पहले भीतर के पद को सरल करें, फिर वर्ग करें।

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(\left\(\sqrt{11}+2\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{11}+2\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(15+4\sqrt{11}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{11}\)2+2\sqrt{11}\times2+22=11+4\sqrt{11}+4=15+4\sqrt{11}).

Step 3

Exam Tip

Forgetting the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{11}\)2+2\sqrt{11}\times2+22=11+4\sqrt{11}+4=15+4\sqrt{11})। चरण 3: मध्य पद (2ab) को भूलना सामान्य गलती है।

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(\left\(\sqrt{7}+1\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{7}+1\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(8+2\sqrt{7}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7}).

Step 3

Exam Tip

Forgetting the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7})। चरण 3: मध्य पद (2ab) को भूलना सामान्य गलती है।

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(\left\(\sqrt{5}+2\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{5}+2\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(9+4\sqrt{5}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{5}\)2+2\(\sqrt{5}\)(2)+22=5+4\sqrt{5}+4=9+4\sqrt{5}).

Step 3

Exam Tip

Missing the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{5}\)2+2\(\sqrt{5}\)(2)+22=5+4\sqrt{5}+4=9+4\sqrt{5})। चरण 3: मध्य पद (2ab) को छोड़ना सामान्य गलती है।

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यदि (a=93), (q=5) और (r=8), तो (b) का मान क्या होगा?

If (a=93), (q=5), and (r=8), what is the value of (b)?

Explanation opens after your attempt
Correct Answer

C. (17)

Step 1

Concept

Substitute in (a=bq+r): (93=5b+8).

Step 2

Why this answer is correct

(85=5b), so (b=17).

Step 3

Exam Tip

To find the unknown divisor, subtract the remainder first. चरण 1: (a=bq+r) में मान रखें: (93=5b+8)। चरण 2: (85=5b), इसलिए (b=17)। चरण 3: अज्ञात भाजक निकालने से पहले शेषफल घटाएं।

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यदि (a=11q+27), तो (a) को (11) से भाग देने पर सही शेषफल क्या होगा?

If (a=11q+27), what is the correct remainder when (a) is divided by (11)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

Divide (27) by (11).

Step 2

Why this answer is correct

\(27=11 \times 2+5\), so (11q+27=11(q+2)+5).

Step 3

Exam Tip

Finding the remainder of the large added part separately is an easy method. चरण 1: (27) को (11) से बाँटें। चरण 2: \(27=11 \times 2+5\), इसलिए (11q+27=11(q+2)+5)। चरण 3: बड़े जोड़े गए भाग का अलग से शेषफल निकालना सरल तरीका है।

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यदि (a=97), (q=8) और (r=1), तो (b) का मान क्या होगा?

If (a=97), (q=8), and (r=1), what is the value of (b)?

Explanation opens after your attempt
Correct Answer

C. (12)

Step 1

Concept

Substitute in (a=bq+r): (97=8b+1).

Step 2

Why this answer is correct

(96=8b), so (b=12).

Step 3

Exam Tip

To find the unknown divisor, subtract the remainder first. चरण 1: (a=bq+r) में मान रखें: (97=8b+1)। चरण 2: (96=8b), इसलिए (b=12)। चरण 3: अज्ञात भाजक निकालने से पहले शेषफल घटाना आसान तरीका है।

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यदि (a=7q+9), तो (a) को (7) से भाग देने पर सही शेषफल क्या होगा?

If (a=7q+9), what is the correct remainder when (a) is divided by (7)?

Explanation opens after your attempt
Correct Answer

C. (2)

Step 1

Concept

(9) cannot be the remainder because it is greater than (7).

Step 2

Why this answer is correct

(9=7+2), so (7q+9=7(q+1)+2).

Step 3

Exam Tip

A large remainder must be converted into the correct range. चरण 1: (9) शेषफल नहीं हो सकता क्योंकि वह (7) से बड़ा है। चरण 2: (9=7+2), इसलिए (7q+9=7(q+1)+2)। चरण 3: बड़े शेषफल को सही सीमा में बदलना जरूरी है।

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यदि (a=82), (q=6) और (r=4), तो (b) का मान क्या होगा?

If (a=82), (q=6), and (r=4), what is the value of (b)?

Explanation opens after your attempt
Correct Answer

B. (13)

Step 1

Concept

Substitute in (a=bq+r): (82=6b+4).

Step 2

Why this answer is correct

(82-4=78), so (6b=78) and (b=13).

Step 3

Exam Tip

To find the unknown divisor, subtract the remainder first. चरण 1: (a=bq+r) में मान रखें: (82=6b+4)। चरण 2: (82-4=78), इसलिए (6b=78) और (b=13)। चरण 3: अज्ञात भाजक निकालने से पहले शेषफल घटाएं।

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यदि (a=9q+12), तो इसे (9) से भाग देने का सही यूक्लिडीय रूप क्या होगा?

If (a=9q+12), what is its correct Euclidean form for division by (9)?

Explanation opens after your attempt
Correct Answer

B. (a=9(q+1)+3)

Step 1

Concept

The remainder must be less than (9).

Step 2

Why this answer is correct

(12=9+3), so (9q+12=9(q+1)+3).

Step 3

Exam Tip

If the leftover part is greater than the divisor, divide it again. चरण 1: शेषफल (9) से छोटा होना चाहिए। चरण 2: (12=9+3), इसलिए (9q+12=9(q+1)+3)। चरण 3: यदि बचा भाग भाजक से बड़ा हो तो उसे फिर से बाँटें।

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यदि (a=73) और (r=3), (q=7), तो (b) का मान क्या होगा?

If (a=73), (r=3), and (q=7), what is the value of (b)?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

Substitute in (a=bq+r): (73=7b+3).

Step 2

Why this answer is correct

(70=7b), so (b=10).

Step 3

Exam Tip

To find an unknown divisor, subtract the remainder first. चरण 1: (a=bq+r) में मान रखें: (73=7b+3)। चरण 2: (70=7b), इसलिए (b=10)। चरण 3: अज्ञात भाजक निकालते समय पहले शेषफल घटाएं।

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कौन सा विकल्प केवल अपरिमेय संख्याओं का समूह है?

Which option is a set of only irrational numbers?

Explanation opens after your attempt
Correct Answer

A. \({\sqrt{3},\sqrt{5},\sqrt{12}}\)

Step 1

Concept

\(\sqrt{3}\), \(\sqrt{5}\), and \(\sqrt{12}\) are all irrational. Remove options with perfect squares and rational numbers.

Step 2

Why this answer is correct

The correct answer is A. \({\sqrt{3},\sqrt{5},\sqrt{12}}\). \(\sqrt{3}\), \(\sqrt{5}\), and \(\sqrt{12}\) are all irrational. Remove options with perfect squares and rational numbers.

Step 3

Exam Tip

\(\sqrt{3}\), \(\sqrt{5}\) और \(\sqrt{12}\) सभी अपरिमेय हैं। पूर्ण वर्ग और परिमेय संख्या वाले विकल्प हटाएँ।

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कौन सा विकल्प केवल परिमेय संख्याओं का समूह है?

Which option is a set of only rational numbers?

Explanation opens after your attempt
Correct Answer

A. \({2,-5,0.4,\frac{7}{8}}\)

Step 1

Concept

All numbers in the first set can be written in \(\frac{p}{q}\) form. The other sets contain an irrational number.

Step 2

Why this answer is correct

The correct answer is A. \({2,-5,0.4,\frac{7}{8}}\). All numbers in the first set can be written in \(\frac{p}{q}\) form. The other sets contain an irrational number.

Step 3

Exam Tip

पहले समूह की सभी संख्याएँ \(\frac{p}{q}\) रूप में लिखी जा सकती हैं। बाकी समूहों में अपरिमेय संख्या है।

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कौन सा विकल्प सही क्रम दिखाता है?

Which option shows the correct order?

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Correct Answer

A. प्राकृतिक संख्याएँ पूर्ण संख्याओं का भाग हैं और पूर्ण संख्याएँ पूर्णांकों का भाग हैंNatural numbers are part of whole numbers and whole numbers are part of integers

Step 1

Concept

In sets, natural numbers lie inside whole numbers. Whole numbers lie inside integers.

Step 2

Why this answer is correct

The correct answer is A. प्राकृतिक संख्याएँ पूर्ण संख्याओं का भाग हैं और पूर्ण संख्याएँ पूर्णांकों का भाग हैं / Natural numbers are part of whole numbers and whole numbers are part of integers. In sets, natural numbers lie inside whole numbers. Whole numbers lie inside integers.

Step 3

Exam Tip

समुच्चयों में प्राकृतिक संख्याएँ पूर्ण संख्याओं के अंदर आती हैं। पूर्ण संख्याएँ पूर्णांकों के अंदर आती हैं।

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कौन सी संख्या प्राकृतिक संख्या भी है और परिमेय संख्या भी है?

Which number is both a natural number and a rational number?

Explanation opens after your attempt
Correct Answer

A. (9)

Step 1

Concept

(9) is a counting number and \(9=\frac{9}{1}\). So it is both natural and rational.

Step 2

Why this answer is correct

The correct answer is A. (9). (9) is a counting number and \(9=\frac{9}{1}\). So it is both natural and rational.

Step 3

Exam Tip

(9) गिनती की संख्या है और \(9=\frac{9}{1}\) भी है। इसलिए यह प्राकृतिक और परिमेय दोनों है।

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सभी परिमेय और अपरिमेय संख्याएँ मिलकर कौन सा समुच्चय बनाती हैं?

All rational and irrational numbers together form which set?

Explanation opens after your attempt
Correct Answer

A. वास्तविक संख्याएँReal numbers

Step 1

Concept

Real numbers include both rational and irrational numbers. These are placed on the number line.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक संख्याएँ / Real numbers. Real numbers include both rational and irrational numbers. These are placed on the number line.

Step 3

Exam Tip

वास्तविक संख्याओं में परिमेय और अपरिमेय दोनों शामिल होते हैं। संख्या रेखा पर इन्हीं का स्थान होता है।

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