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

  • A
    $3 u$
  • B
    $4 u$
  • C
    $3 \sin u$
  • D
    $3 \tan u$

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

જો $z = y + f(v)$,જ્યાં $v = \frac{x}{y}$ હોય,તો $v \frac{\partial z}{\partial x} + \frac{\partial z}{\partial y}$ ની કિંમત શું થાય?

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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 $u=e^{x^2-y^2}$ હોય,તો

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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