$\tan^{-1}x$ के सापेक्ष $\frac{{\tan^{-1}x}}{{1 + \tan^{-1}x}}$ का अवकल गुणांक ज्ञात कीजिए।

  • A
    $\frac{1}{{1 + \tan^{-1}x}}$
  • B
    $\frac{{-1}}{{1 + \tan^{-1}x}}$
  • C
    $\frac{1}{{{(1 + \tan^{-1}x)}^2}}$
  • D
    $\frac{{-1}}{{2{(1 + \tan^{-1}x)}^2}}$

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