यदि $y = \operatorname{Tan}^{-1}\left(\frac{2x}{1-x^2}\right)$ जहाँ $|x| < 1$,तो $x = \frac{1}{2}$ पर $\left(\frac{dy}{dx}\right)$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{5}$
  • B
    $\frac{2}{5}$
  • C
    $\frac{4}{5}$
  • D
    $\frac{8}{5}$

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