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TS EAMCET · Maths · Differentiation

\(y=\log \left\{\left(\frac{1+x}{1-x}\right)^{1 / 4}\right\}-\frac{1}{2} \tan ^{-1}(x)\), then \(\frac{d y}{d x}\) is equal to

  1. A \(\frac{x}{1-x^2}\)
  2. B \(\frac{x^2}{1-x^4}\)
  3. C \(\frac{x}{1+x^4}\)
  4. D \(\frac{x}{1-x^4}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{x^2}{1-x^4}\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \text { Given, } y=\log \left\{\left(\frac{1+x}{1-x}\right)^{1 / 4}\right\}-\frac{1}{2} \tan ^{-1} x \\ & \Rightarrow \quad y=\frac{1}{2} \tanh ^{-1} x-\frac{1}{2} \tan ^{-1} x\end{aligned}\) On differentiating w.r. t. \(x\), we get…