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Solve (D2 + 2D + 1) y = 2e–x + cosx + x2 + 1.

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1 Answer

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A.E. is 

m2 + 2m + 1 = 0 

i.e., (m + 1)2 = 0 

m = – 1, – 1 

C.F. = (C1 + C2x)e–x

P.I. = xcosx/(D2 + 2D + 1).

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