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

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

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જો $a(4+x^2)=x$ અને $y-x^3=a^2$ હોય,તો $x=1$ આગળ $\frac{dy}{dx}$ ની કિંમત ... છે.

જો $\log(\sqrt{1+x^2}-x) = y(\sqrt{1+x^2})$ હોય,તો $(1+x^2) \frac{dy}{dx} + xy =$

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