$I \subset R-\{-1,1\}$ पर, $\int \tan ^{-1}\left(\frac{2 x}{1-x^2}\right) d x=$

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

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