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JEE Mains · Maths · STD 11- 2. Relation and Function

माना कि फलनों
\(\mathrm{f}(\mathrm{x})=\log _4 \log _3 \log _7\left(8-\log _2\left(\mathrm{x}^2+4 \mathrm{x}+5\right)\right)\) और \(g(x)=\sin ^{-1}\left(\frac{7 x+10}{x-2}\right)\) के प्रांत क्रमशः \((\alpha, \beta)\) और \([\gamma, \delta]\) हैं। तब \(\alpha^2+\beta^2+\gamma^2+\delta^2\) = __________

  1. A \(15\)
  2. B \(13\)
  3. C \(16\)
  4. D \(14\)
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Answer & Solution

Correct Answer

(A) \(15\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & \log _3\left(\log _7\left(8-\log _2\left(\mathrm{x}^2+4 \mathrm{x}+5\right)\right)\right) \gt 0 \\ & \log _2\left(\mathrm{x}^2+4 \mathrm{x}+5\right) \lt 1 \\ & \mathrm{x}^2+4 \mathrm{x}+3 \lt 0 \\ & \Rightarrow \mathrm{x} \in(-3,-1) \\ & -1 \leq \frac{7…

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