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Question

solve : xdydx+y=x2y4

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Solution

Consider the given equation.

xdydx+y=x2y4

dydx+yx=xy4 …….. (1)

We know that the general equation,

dydx+Py=Q ……… (2)

On comparing both equations, we get

P=1x,Q=xy4

Therefore, the integrating factor

I.F=ePdx

I.F=e1xdx

I.F=elnx

I.F=x

Therefore, the general solution

y×I.F=(xy4×I.F)dx+C

y×x=(xy4×x)dx+C

yx=y4x2dx+C

yx=y4(x33)+C

Hence, this is the answer.

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