જો $x^2+y^2=t+\frac{2}{t}$ અને $x^4+y^4=t^2+\frac{4}{t^2}$ હોય, તો $x^3 y \frac{d y}{d x}$ ની કિંમત શોધો.

  • A
    -$1$
  • B
    -$2$
  • C
    $\frac{y}{x}$
  • D
    $x y$

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જો $x^2 \tan ^{-1} \frac{y}{x}-y^2 \tan ^{-1} \frac{x}{y}=k$ હોય,તો $\left(\frac{d y}{d x}\right)_{(1,1)}=$

જો $xy = \tan^{-1}(xy) + \cot^{-1}(xy)$ હોય,તો $\frac{dy}{dx}$ ની કિંમત શોધો.

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

જો $\log (x+y)-2xy=0$ હોય,તો $y^{\prime}(0)=$

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

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