જો ${x^y} = {e^{x - y}}$ હોય,તો $\frac{dy}{dx} = $

  • A
    $\log x \cdot [\log (ex)]^{-2}$
  • B
    $\log x \cdot [\log (ex)]^2$
  • C
    $\log x \cdot (\log x)^2$
  • D
    આમાંથી કોઈ નહીં

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વિધેય $xy = e^{(x-y)}$ માટે $\frac{dy}{dx}$ શોધો.

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