diff-equation

Question: The solution of $y{{e}^{-x/y}}dx-(x{{e}^{-x/y}}+{{y}^{3}})dy=0$ is



1) $\frac{{{y}^{2}}}{2}+{{e}^{-x/y}}=k$
2) $\frac{{{x}^{2}}}{2}+{{e}^{-x/y}}=k$
3) $\frac{{{x}^{2}}}{2}+{{e}^{x/y}}=k$
4) $\frac{{{y}^{2}}}{2}+{{e}^{x/y}}=k$
Solution: Explanation: No Explanation
Exact differential equations

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