यदि $f(x) = \frac{e^{-x} \sin x}{\log_e x}$ और $f'(x) = f(x) \cdot g(x)$ है, तो $g'(e) =$

  • A
    $e^{-2} - \operatorname{cosec}^2(e)$
  • B
    $2e^{-2} - \operatorname{cosec}^2(e)$
  • C
    $2e^{-2} - \operatorname{cosec}^2(e)$
  • D
    $2e^{-2} + \operatorname{cosec}^2(e)$

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यदि $y = \frac{e^{2x} \cos x}{x \sin x}$ है,तो $\frac{dy}{dx} = $

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