1.

The integrating factor of differential equation `dy/dx+y=(1+y)/x` isA. `(x)/(e^(x))`B. `(e^(x))/(x)`C. `xe^(x)`D. `e^(x)`

Answer» Correct Answer - B
We have, `(dy)/(dx)+(1-(1)/(x))y-(1)/(x)`.
`therefore" I.F. "=e^(int(1-(1)/(x))dx)=e^(x-logx)=(1)/(x)e^(x)`


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