જો $u = \tan^{-1}\left(\frac{x^3 + y^3}{x - y}\right)$ હોય,તો $x\frac{\partial u}{\partial x} + y\frac{\partial u}{\partial y} = $

  • A
    $\sin 2u$
  • B
    $\cos 2u$
  • C
    $\tan 2u$
  • D
    $\sec 2u$

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Similar Questions

જો $z = \tan^{-1}\left(\frac{x}{y}\right)$ હોય,તો $z_x : z_y = $

જો $u = \sin^{-1}\left(\frac{x}{y}\right) + \tan^{-1}\left(\frac{y}{x}\right)$ હોય, તો $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ નું મૂલ્ય શું થાય?

જો $u = x y^2 \tan^{-1}\left(\frac{y}{x}\right)$ હોય,તો $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ ની કિંમત શોધો.

$z=\tan (y+a x)+\sqrt{y-a x} \Rightarrow z_{x x}-a^2 z_{y y}$ ની કિંમત શોધો.

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