यदि $e^y(x+1)=1$ है,तो $\frac{d^2 y}{d x^2} = $ . . . . . .

  • A
    $\left(\frac{d y}{d x}\right)$
  • B
    $-\left(\frac{d y}{d x}\right)$
  • C
    $-\left(\frac{d y}{d x}\right)^2$
  • D
    $\left(\frac{d y}{d x}\right)^2$

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