જો $y = \frac{\log x}{x}$ હોય,તો $x = 1$ આગળ $\frac{d^2 y}{d x^2}$ ની કિંમત શોધો.

  • A
    $-e^{-3}$
  • B
    $-3$
  • C
    $3$
  • D
    $e^3$

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જો $\sqrt{x+y}-\sqrt{x-y}=c$ હોય,તો $\frac{d^2 y}{d x^2}=$

વિધેય $y = \tan^{-1} x$ માટે,$(1 + x^2) y_2$ ની કિંમત . . . . . . છે.

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