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JEE Mains · Maths · STD 12 - 5. continuity and differentiation

यदि \(f ( x )=\sin \left(\cos ^{-1}\left(\frac{1-2^{2 x }}{1+2^{2 x }}\right)\right)\) है तथा इसका \(x\) के सापेक्ष प्रथम अवकलज \(-\frac{b}{a} \log _{0} 2\) है जब \(x =1\) है, जहाँ \(a\) तथा \(b\) पूर्णांक है, तो \(\left| a ^{2}- b ^{2}\right|\) का न्यूनतम मान है ..........

  1. A \(373\)
  2. B \(481\)
  3. C \(426\)
  4. D \(524\)
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Answer & Solution

Correct Answer

(B) \(481\)

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Detailed explanation

\(f ( x )=\sin \left(\cos ^{-1}\left(\frac{1-2^{2 x }}{1+2^{2 x }}\right)\right)\) at \(x =1 ; 2^{2 x }=4\) for \(\sin \left(\cos ^{-1}\left(\frac{1- x ^{2}}{1+ x ^{2}}\right)\right)\) Let \(\tan ^{-1} x =\theta ; \theta \in\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)\)…
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