જો $y = \tan^{-1} \left( \frac{\sqrt{1 + x^2} + \sqrt{1 - x^2}}{\sqrt{1 + x^2} - \sqrt{1 - x^2}} \right)$,જ્યાં $x^2 \le 1$ હોય,તો $\frac{dy}{dx}$ શોધો.

  • A
    $\frac{\pi}{4} + \frac{1}{2} \cos^{-1} (x^2)$
  • B
    $\frac{\pi}{4} - \frac{1}{2} \cos^{-1} (x^2)$
  • C
    $\frac{-x}{\sqrt{1 - x^4}}$
  • D
    $\frac{-2x}{\sqrt{1 - x^4}}$

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