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    Second order differential equations

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    See the attached file.
    (Fun) 3. Find the general solution using the method of undetermined coefficients:
    y" - 2y' - 3y = t +e^-t

    (More Fun) 4. Find the general solution using the method of undetermined coefficients:
    y" + 4y = [sin(t)]^2
    (Hint: Express sin²t in terms of cos2t)

    (Most Fun) 5. Find the general solution using the method of undetermined coefficients:
    y" + 2y' + 2y = e^(-x) cosx.

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    https://brainmass.com/math/calculus-and-analysis/second-order-differential-equations-28846

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    The solution shows how to use the method of undetermined coefficients. It includes 9 pages with full derivations.

    $2.49

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