$xy = e^{x-y}$ के लिए,$\frac{dy}{dx} =$ . . . . . .

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

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