यदि $x^{y} + y^{x} = a^{b}$ है,तो $x = 1, y = 2$ पर $\frac{dy}{dx}$ का मान ज्ञात कीजिए।

  • A
    $-\frac{2 + \log 2}{1 + 2 \log 2}$
  • B
    $-\frac{2(1 + \log 2)}{1 + 2 \log 2}$
  • C
    $-\frac{2 + \log 2}{2 \log 2}$
  • D
    $-\frac{1 + \log 2}{2 \log 2}$

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यदि $ax^2 + 2hxy + by^2 + 2gx + 2fy + c = 0$ है,तो $\frac{dy}{dx} = $

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यदि $x=\sqrt{1-\tan y}$ है, तो $\frac{dy}{dx}=$

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