Milicevic3306
asked
in Differential Equations
Mar 26, 2018
retagged
Feb 26, 2021
by Lakshman Patel RJIT

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If $z= xy \text{ ln} (xy)$, then

- $x\frac{\partial z}{\partial x}+y\frac{\partial z}{\partial y}= 0 \\$
- $y\frac{\partial z}{\partial x}= x\frac{\partial z}{\partial y} \\$
- $x\frac{\partial z}{\partial x}= y\frac{\partial z}{\partial y} \\$
- $y\frac{\partial z}{\partial x}+x\frac{\partial z}{\partial y}= 0$