- #1
yecko
Gold Member
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Homework Statement
y″ − 2y′ − 3y = t 3 e 5t cos(3t) ---equation 1
Yp = (At3 + Bt2 + Ct + D) e 5t cos(3t) + (Et3 + Ft2 + Gt + H) e 5t sin(3t) ---equation 2
Homework Equations
If there is any term in common, then the entire complex of product that is the choice for Y must be multiplied by t. Repeat as necessary.
The Attempt at a Solution
In equation 2 , "At3e 5t cos(3t)" is still have same coefficient as the right hand side of equation 1.
why don't we need to times t^4 in order to get rid of it?
thanks