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\begin{exerciseStatement}
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Explain how to find the particular solution to each given IVP.
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\begin{enumerate}[(a)]
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\item \[ 36 \, {x} = -{x''} \hspace{2em}
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{x} (0)= 1 ,
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{x} '(0)= -12 \]
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\item \[ 0 = 10 \, {y} + {y''} - 7 \, {y'} \hspace{2em}
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{y} (0)= -2 ,
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{y} '(0)= -13 \]
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\end{enumerate}
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\end{exerciseStatement}
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\begin{exerciseAnswer}
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\[ {x} = \cos\left(6 \, t\right) - 2 \, \sin\left(6 \, t\right) \]\[ {y} = -3 \, e^{\left(5 \, t\right)} + e^{\left(2 \, t\right)} \]
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\end{exerciseAnswer}
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