यदि $\frac{x}{x-y} = \log \left(\frac{a}{x-y}\right)$ है,तो $\frac{dy}{dx} =$

  • A
    $2 + \frac{1}{y}$
  • B
    $\frac{2y - x}{y}$
  • C
    $\frac{2x - y}{x}$
  • D
    $\frac{x - 2y}{y}$

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यदि $xy \neq 0, x+y \neq 0$ और $x^m y^n=(x+y)^{m+n}$,जहाँ $m, n \notin N$ है,तो $\frac{dy}{dx}$ का मान ज्ञात कीजिए।

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यदि $\sin(xy) + \cos(xy) = 0$ है,तो $\frac{dy}{dx} = $

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