1.

Solution of the equation \[(x+\log y)dy+y\,dx=0\] is

A.                 \[xy+y\log y=c\]   
B.                 \[xy+y\log y-y=c\]
C.                 \[xy+\log y-x=c\] 
D.                 None of these
Answer» C.                 \[xy+\log y-x=c\] 


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