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

  • A
    $-\frac{y}{x^2 + y^2}$
  • B
    $\frac{x}{\sqrt{1 - y^2}}$
  • C
    $-\frac{y}{\sqrt{x^2 - y^2}}$
  • D
    $-\frac{y}{x\sqrt{x^2 - y^2}}$

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જો $z = \frac{(x^4 + y^4)^{1/3}}{(x^3 + y^3)^{1/4}}$ હોય,તો $x\frac{\partial z}{\partial x} + y\frac{\partial z}{\partial y} = $

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} = $

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

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