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

माना \(\alpha \in R\) इस प्रकार है कि फलन \(f(x)=\left\{\begin{array}{ll}\frac{\cos ^{-1}\left(1-\{x\}^{2}\right) \sin ^{-1}(1-\{x\})}{\{x\}-\{x\}^{3}}, & x \neq 0 \\ \alpha, & x=0\end{array}\right.\) \(x =0\) पर संतत है, जहाँ \(\{ x \}= x -[ x ],[ x ]\) महत्तम पूर्णांक \(\leq x\) है। तो

  1. A \(\alpha=\frac{\pi}{\sqrt{2}}\)
  2. B \(\alpha=0\)
  3. C इस प्रकार के \(\alpha\) का अस्तित्व नहीं है
  4. D \(\alpha=\frac{\pi}{4}\)
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Answer & Solution

Correct Answer

(C) इस प्रकार के \(\alpha\) का अस्तित्व नहीं है

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Detailed explanation

\(\operatorname{Lim}_{x \rightarrow 0^{+}} f(x)=f(0)=\operatorname{Lim}_{x \rightarrow 0^{-}}(x)\) \(\operatorname{Lim}_{x \rightarrow 0^{+}} \frac{\cos ^{-1}\left(1-x^{2}\right) \cdot \sin ^{-1}(1-x)}{x(1-x)(1+x)}\)…
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