જો $x^{2019} \cdot y^{2020}=(x+y)^{4039}$ હોય,તો $\frac{dy}{dx}=$

  • A
    $0$
  • B
    $\frac{x}{y}$
  • C
    $\frac{y}{x}$
  • D
    $1$

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Difficult
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$x > 1$ માટે,જો $(2x)^{2y} = 4e^{2x-2y}$ હોય,તો $(1 + \log_e 2x)^2 \frac{dy}{dx}$ ની કિંમત શોધો.

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