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Question

The integrating factor for the differential equation
dydx+xy=sin(x) is

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Solution

The given differential equation is an First order linear Differential equation
dydx+Py=Q
In which P and Q are functions of x with
I.F.=ePdx
Therefore for dydx+xy=sin(x)
we get, P=x
I.F.=exdx
I.F.=ex22





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