यदि $y = \sin x + e^x$ है,तो $\frac{d^2x}{dy^2} = $

  • A
    $(\sin x - e^x)^{-1}$
  • B
    $\frac{\sin x - e^x}{(\cos x + e^x)^2}$
  • C
    $\frac{\sin x - e^x}{(\cos x + e^x)^3}$
  • D
    $\frac{\sin x + e^x}{(\cos x + e^x)^3}$

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