This article directly get it's special solution by the method of elementary integrals, and the method is simple and has wider range.
文章用初等积分法直接来求其特解，该方法简单、方便，且适用范围广。
This article directly get it's special solution by the method of elementary integrals, and the method is simple and has wider range.
文章用初等积分法直接来求其特解，该方法简单、方便，且适用范围广。
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