જો $f(x)$ નું પ્રતિવિકલિત (antiderivative) $e^x$ હોય અને $g(x)$ નું પ્રતિવિકલિત $\cos x$ હોય,તો $\int f(x) \cos x \, dx + \int g(x) e^x \, dx = $

  • A
    $f(x)g(x) + c$
  • B
    $f(x) + g(x) + c$
  • C
    $e^x \cos x + c$
  • D
    $f(x) / g(x) + c$

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$\int \frac{x e^{x} d x}{(1+x)^{2}}$ ની કિંમત શોધો.

$\int e^x \left( \frac{x-1}{x^2} \right) dx =$

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