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:

  • A
    $\sin u$
  • B
    $\tan u$
  • C
    $\cos u$
  • D
    $\cot u$

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જો $z = \sec^{-1}\left(\frac{x^4+y^4-8x^2y^2}{x^2+y^2}\right)$ હોય, તો $x \frac{\partial z}{\partial x} + y \frac{\partial z}{\partial y}$ ની કિંમત શોધો.

જો $z = \frac{y}{x} \left[ \sin \left( \frac{x}{y} \right) + \cos \left( 1 + \frac{y}{x} \right) \right]$ હોય,તો $x \frac{\partial z}{\partial x} = $

જો $u = \sin^{-1} \sqrt{\frac{x^2 + y^2}{x + y}}$ હોય,તો $x u_x + y u_y$ ની કિંમત શોધો.

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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.

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?

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