यदि $y = (1 + x^2) \tan^{-1} x - x$ है,तो $\frac{dy}{dx}$ क्या है?

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

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