# Inhomogeneous diff. eq.

kasse
y''+4y = x*sin2x

Find a particular solution using the method of undetermined coefficients.
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No idea what to do here. My table has no suggestion for a particular solution when r(x) = x*sin2x.

Homework Helper
The RHS consists of the product of a Polynomial of degree one and a trig function

so the P.I. would be (P.I.of the polynomial)*(P.I. for the trig function)