If \[y+x\frac{dy}{dx}=x\frac{\phi (xy)}{\phi '(xy)}\] then \[\phi (xy)\] is equation to

If \[y+x\frac{dy}{dx}=x\frac{\phi (xy)}{\phi '(xy)}\] then \[\phi (xy)

1.	If \[y+x\frac{dy}{dx}=x\frac{\phi (xy)}{\phi '(xy)}\] then \[\phi (xy)\] is equation to
A.	\[k{{e}^{{{x}^{2}}/2}}\]
B.	\[k{{e}^{{{y}^{2}}/2}}\]
C.	\[k{{e}^{xy/2}}\]
D.	\[k{{e}^{xy}}\]
Answer» B. \[k{{e}^{{{y}^{2}}/2}}\]

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If \[y+x\frac{dy}{dx}=x\frac{\phi (xy)}{\phi '(xy)}\] then \[\phi (xy)\] is equation to

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