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 331-340 of 600 questions.
What is the value of ((-2)4-(-2)3)?
A. (,24,)
((-2)4=16) और ((-2)3=-8), इसलिए (16-(-8)=24)। परीक्षा में odd और even powers के sign अलग होते हैं। / ((-2)4=16) and ((-2)3=-8), so (16-(-8)=24). In exams, odd and even powers have different signs.
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What is the value of (\left\(-\dfrac{1}{2}\right\)^{-3})?
A. (,-8,)
ऋणात्मक घात से भिन्न उलटती है, इसलिए (\left\(-\dfrac{1}{2}\right\)^{-3}=(-2)3=-8)। परीक्षा में negative base का sign power के अनुसार रखें। / A negative exponent inverts the fraction, so (\left\(-\dfrac{1}{2}\right\)^{-3}=(-2)3=-8). In exams, keep the sign of a negative base according to the power.
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If \(x \neq 0\), what is the simplified form of (\(4x^{-2}\)^{-1})?
A. \(,\dfrac{x^2}{4},\)
(\(4x^{-2}\)^{-1}=4^{-1}x-2=\dfrac{x-2}{4})। परीक्षा में product के हर factor पर बाहर की घात लगाएं। / (\(4x^{-2}\)^{-1}=4^{-1}x-2=\dfrac{x-2}{4}). In exams, apply the outside exponent to every factor of a product.
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What is the value of (\(\sqrt{5}+\sqrt{2}\)\(\sqrt{5}-\sqrt{2}\))?
A. (,3,)
यह ((a+b)(a-b)=a-2-b-2) है, इसलिए (5-2=3)। परीक्षा में conjugate product को पहचानें। / This is ((a+b)(a-b)=a-2-b-2), so (5-2=3). In exams, identify a conjugate product.
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What is the value of (\(2+\sqrt{3}\)2+\(2-\sqrt{3}\)2)?
A. (,14,)
दोनों वर्ग जोड़ने पर surd terms कट जाते हैं और (7+7=14) मिलता है। परीक्षा में conjugate expressions में irrational terms अक्सर cancel होते हैं। / When the two squares are added, the surd terms cancel and (7+7=14). In exams, irrational terms often cancel in conjugate expressions.
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What is the simplified form of (\(x^{\frac{1}{3}}\)6)?
A. \(,x^2,\)
Power of power नियम से (\(x^{\frac{1}{3}}\)6=x^{\frac{6}{3}}=x-2)। परीक्षा में घातों को गुणा करें। / By the power of a power law, (\(x^{\frac{1}{3}}\)6=x^{\frac{6}{3}}=x-2). In exams, multiply the exponents.
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If \(a \neq 0\) and \(b \neq 0\), what is the simplified form of \(a^2b^{-3}\div a^{-1}b\)?
A. \(,\dfrac{a^3}{b^4},\)
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। / 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.
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What is the value of (\left\(\dfrac{81}{16}\right\)^{-\frac{1}{2}})?
A. \(,\dfrac{4}{9},\)
पहले (\left\(\dfrac{81}{16}\right\)^{\frac{1}{2}}=\dfrac{9}{4}), फिर ऋणात्मक घात से उत्तर \(\dfrac{4}{9}\) होता है। परीक्षा में square root और reciprocal दोनों देखें। / First, (\left\(\dfrac{81}{16}\right\)^{\frac{1}{2}}=\dfrac{9}{4}), then the negative exponent gives \(\dfrac{4}{9}\). In exams, check both the square root and the reciprocal.
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What is the simplified form of (\dfrac{\(10^3\)2}{10^{-2}})?
A. \(,10^8,\)
(\(10^3\)2=106) और \(\dfrac{10^6}{10^{-2}}=10^{6-(-2)}=10^8\)। परीक्षा में negative exponent को घटाते समय सावधान रहें। / (\(10^3\)2=106) and \(\dfrac{10^6}{10^{-2}}=10^{6-(-2)}=10^8\). In exams, be careful while subtracting a negative exponent.
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If \(2^x=3\), what is the value of \(8^x\)?
A. (,27,)
क्योंकि (8^x=\(2^3\)^x=\(2^x\)3=33=27)। परीक्षा में दिए गए expression को known base के रूप में बदलें। / Since (8^x=\(2^3\)^x=\(2^x\)3=33=27). In exams, rewrite the expression using the known base.
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