यदि $x^{x}=y^{y}$ है,तो $\frac{d y}{d x}$ क्या है?

  • A
    $-\frac{y}{x}$
  • B
    $-\frac{x}{y}$
  • C
    $1+\log \left(\frac{x}{y}\right)$
  • D
    $\frac{1+\log x}{1+\log y}$

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