$x = \frac{1-\sqrt{y}}{1+\sqrt{y}} \Rightarrow \frac{dy}{dx}$ का मान ज्ञात कीजिए।

  • A
    $\frac{4}{(x+1)^2}$
  • B
    $\frac{4(x-1)}{(1+x)^3}$
  • C
    $\frac{x-1}{(1+x)^3}$
  • D
    $\frac{4}{(x+1)^3}$

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