જો $u = \tan^{-1}\left(\frac{x^3 + y^3}{x - y}\right)$ હોય,તો $x\frac{\partial u}{\partial x} + y\frac{\partial u}{\partial y} = $

  • A
    $\sin 2u$
  • B
    $\cos 2u$
  • C
    $\tan 2u$
  • D
    $\sec 2u$

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Similar Questions

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 $F(u) = f(x, y, z)$ એ $x, y, z$ માં $n$ ઘાત ધરાવતું સમપરિમાણીય વિધેય હોય, તો $x\frac{\partial u}{\partial x} + y\frac{\partial u}{\partial y} + z\frac{\partial u}{\partial z} = $

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

જો ${z^2} = \frac{{x^{1/2} + y^{1/2}}}{{x^{1/3} + y^{1/3}}}$ હોય,તો $x\frac{{\partial z}}{{\partial x}} + y\frac{{\partial z}}{{\partial y}} = $

જો $u = \frac{x + y}{x - y}$ હોય,તો $\frac{\partial u}{\partial x} + \frac{\partial u}{\partial y} = $

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