यदि $f(x)$ का प्रतिअवकलज (antiderivative) $e^x$ है और $g(x)$ का प्रतिअवकलज $\cos x$ है,तो $\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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यदि $\int_2^{e}\left[\frac{1}{\log x}-\frac{1}{(\log x)^2}\right] dx = a+\frac{b}{\log 2}$ है,तो:

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