By using fundamental solution matrix and method of perturbation, we give the expression of general solutions for two classes of differential equations.
运用基解矩阵和摄动方法，给出了两类微分方程的通解表达式。
By using the characteristic vector method, the fundamental matrix solution is obtained.
采用特征向量法求其基本矩阵解。
By using the characteristic vector method, the fundamental matrix solution is obtained.
采用特征向量法求其基本矩阵解。
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