જો $\int e^x \left(\frac{x+2}{x+4}\right)^2 dx = f(x) + C$ હોય,તો $f(x) =$

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

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