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Question

For d2ydx2+4dydx+3y=3e2x, the particular integrals is

A
115e2x
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B
15e2x
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C
3e2x
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D
C1ex+C2e3x
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Solution

The correct option is B 15e2x
Given the differential equation
d2ydx2+4dydx+3y=3e2x
P.I. = 31(D2+4D+3)e2x
=3122+4.2+3e2x=315e2x
P.I. =15e2x

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