Solution of the equation xdy−y+xy3(1+logx)dx=0 is
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a
−x2y2=2x3323+logx+c
b
x2y2=2x3323+logx+c
c
−x2y2=x3323+logx+c
d
none of these
answer is A.
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Detailed Solution
We have xdy−ydx=xy3(1+logx)dx⇒−ydx−xdyy2=xy(1+logx)dx Observing the complete differentials, we get −dxy=xy(1+logx)dx⇒−xydxy=x2(1+logx)dx−xy2=(1+logx)x33−∫x33⋅1xdx⇒−x22y2=x33(1+logx)−x39+c2⇒−x2y2=2x3323+logx+c