જો $y = [(x+1)(2x+1)(3x+1) \ldots (nx+1)]^n$ હોય,તો $x=0$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

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

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