Use the method of undetermined coefficients (it works the same way for a fourth order linear...

Use the method of undetermined coefficients (it works the same way for a fourth order linear equation) to find the general solution of:

y⁽⁴⁾ - 18y'' + 81y = 6t² - 4t + 36 + 90e^3t

[Hint: The complementary solution is y_c = C₁e^3t + C₂e^-3t + C₃te^3t + C₄te^-3t

Expert Solution

Colby Messinger answered 2 years ago

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