यदि ${y^x} + {x^y} = {a^b}$ है,तो $\frac{dy}{dx} = $

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

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