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Questions  

The general solution of y'+xy=4x  is given by

 

a
y=e(−1/2)x2+Cx
b
y=e(1/2)x2+Cx
c
y=Ce(1/2)x2−4
d
y=e(1/2)x2+Cx+4

detailed solution

Correct option is C

The given equation is a linear equation withI.F.= e−∫xdx=e−12x2. so ddxye−12x2=4xe−12x2⇒ye−12x2=4∫xe−12x2dx+C=−4e−12x2+Cso y=−4+Ce12x2

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