i solved homogenous but(adsbygoogle = window.adsbygoogle || []).push({});

y"+y'+4y = 2sinh(T)

is giving me trouble

also have a hint

sinh t = (e^t - e^-t)/2

also my "guess" was

aE^t +Be^-t=Y

maybe my guess was wrong?

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# Help undetermined coefficients

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