જો $x+1=e^{-y}$ હોય,તો $\frac{d^2 y}{d x^2} = $ . . . . . .

  • A
    $\left(\frac{d y}{d x}\right)^3$
  • B
    $\left(\frac{d y}{d x}\right)^2$
  • C
    $\frac{d y}{d x}$
  • D
    $-\frac{d y}{d x}$

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જો $f(x)=1+nx+\frac{n(n-1)}{2}x^2+\frac{n(n-1)(n-2)}{6}x^3+\ldots+x^n$ હોય,તો $f''(1)$ ની કિંમત કેટલી થાય?

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