Solve $y'' + y = \sin(t) + t^2 + e^{2t} + te^t.$
Added by David L.
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Step 1
The characteristic equation is r^2 + 1 = 0, which has roots r = ±i. Therefore, the homogeneous solution is y_h(t) = c1 cos(t) + c2 sin(t). Show more…
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