y''+16y=24cos(4x)(adsbygoogle = window.adsbygoogle || []).push({});

it was mentioned in class that our book's answer was wrong on some problem, but I forgot which one and now that's biting me in the butt(I really should've written it down)

For the particular solution I got y=3x*sin(4x), which if I plug it in works. The book's solution: (this is the general solution, so the first part is the complementary solution which is right)

y=c1cos(4x)+c2sin(4x)+1/17*x(24*cos(4x)+96*sin(4x))

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# Homework Help: Is my book wrong?(constant coefficients)

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