જો $u=\log \left(x^3+y^3+z^3-3 x y z\right)$ હોય,તો $(x+y+z)(u_x+u_y+u_z)$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $x-y+z$
  • C
    $2$
  • D
    $3$

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Similar Questions

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

જો $f(x, y) = \frac{\cos(x - 4y)}{\cos(x + 4y)}$ હોય,તો $\left. \frac{\partial f}{\partial x} \right|_{y = \frac{x}{2}}$ ની કિંમત શું થાય?

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

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