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I am stuck on the following question. Can you please help to find the solutions

Using the complementary function and particular integral method, find the solution of the diffential equation which satisfies y(0) = 1 and y'(0) = 0.

y'' + 3y' + 2y = 20cos2x

and then can you help about how to check the answer using technology.

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# Second Order Inhomogeneous ODEs

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