જો $z=\log (\tan x+\tan y)$ હોય,તો $(\sin 2 x) \frac{\partial z}{\partial x}+(\sin 2 y) \frac{\partial z}{\partial y}$ ની કિંમત શોધો.

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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જો $u(x,y) = y \log x + x \log y$ હોય,તો ${u_x}{u_y} - {u_x} \log x - {u_y} \log y + \log x \log y = $

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જો $z=\sec (y-ax)+\tan (y+ax)$ હોય, તો $\frac{\partial^2 z}{\partial x^2}-a^2 \frac{\partial^2 z}{\partial y^2}$ ની કિંમત શોધો.

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

જો $u^2 = (x - a)^2 + (y - b)^2 + (z - c)^2$ હોય,તો $\sum \frac{\partial^2 u}{\partial x^2} = $

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.

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