જો $y = (1 + \frac{1}{x}) (1 + \frac{2}{x}) (1 + \frac{3}{x}) . . . . . . (1 + \frac{n}{x})$ અને $x \neq 0$ હોય,તો $x = -1$ માટે $\frac{dy}{dx}$ શોધો.

  • A
    $n!$
  • B
    $(n - 1)!$
  • C
    $(-1)^n (n - 1)!$
  • D
    $(-1)^n n!$

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