જો $u = u(x, y) = \sin(y + ax) - (y + ax)^2$ હોય,તો નીચેનામાંથી શું સાચું છે?

  • A
    $u_{xx} = a^2 u_{yy}$
  • B
    $u_{yy} = a^2 u_{xx}$
  • C
    $u_{xx} = -a^2 u_{yy}$
  • D
    $u_{yy} = -a^2 u_{xx}$

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Similar Questions

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

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

જો $u=\log \left(x^3+y^3+z^3-3 x y z\right)$ હોય,તો $(x+y+z)(u_x+u_y+u_z)$ ની કિંમત શોધો.

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