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JEE Mains · Maths · STD 12 - 1. relation and function

જો વિધેય \(f(x)=\log _e\left(4 x^2+11 x+6\right)+\sin ^{-1}(4 x+3)+\cos ^{-1}\left(\frac{10 x+6}{3}\right)\) નો પ્રદેશ \((\alpha, \beta]\) હોય, તો \(36|\alpha+\beta|=......\)

  1. A \(63\)
  2. B \(45\)
  3. C \(72\)
  4. D \(54\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(45\)

Step-by-step Solution

Detailed explanation

\(f(x)=\ln \left(4 x^2+11 x+6\right)+\sin ^{-1}(4 x+3)\) \(+\cos ^{-1}\left(\frac{10 x+6}{3}\right)\) \(\text { (i) } 4 x^2+11 x+6 > 0\) \(4 x^2+8 x+3 x+6 > 0\) \((4 x+3)(x+2) > 0\) \(x \in(-\infty,-2) \cup\left(-\frac{3}{4}, \infty\right)\) \(\text { (ii) } 4 x+3 \in[-1,1]\)…
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