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\noindent Quiz 6

\noindent Math 230

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\noindent 1.  Find the general solution of 
$$
y'' + y = \cos x.
$$
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\noindent 2.  Note that $y(t) = t^{-3}$ is a solution of
$$
t^2 y'' + 5ty' + 3y = 0.
$$
Use reduction of order to find the general solution.

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