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演習問題

1. 未定係数法を用いて次の微分方程式を解け．
\begin{displaymath}\begin{array}{ll} (a) y^{\prime\prime} - 4y^{\prime} + 4y =... ... (f) y^{(4)} + 2y^{\prime\prime} + y = x^{2}e^{x} \end{array}\end{displaymath}