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

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

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