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Differential Equations
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OpenStudy (anonymous):
Solve the DE using method of undetermined coefficients. y"+9y=t^2e^3t+6. The answer is y=c1cost+c2sint-(cost)ln(tan3t+sec3t)-1. I'm just confused how to get there.
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OpenStudy (anonymous):
Okay so is this what your first equation is....\[y'' + 9y = t ^{2e ^{3t+6}}\]
OpenStudy (anonymous):
Sorry, its \[(t^2)(e^3t) + 6\] for the right side
OpenStudy (anonymous):
Okay! Thanks though!
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