જો $x^{y} + y^{x} = a^{b}$ હોય,તો $x = 1, y = 2$ આગળ $\frac{dy}{dx}$ શોધો.

  • 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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