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分类讨论是自然科学中基本的逻辑方法,亦称为集合划分思想.它广泛地出现于数学的各个分支之中.当问题所给的对象(参数或自变量)不能统一进行研究时,我们就需要对研
Classification discussion is a basic logic method in the natural sciences. It is also called the idea of set partitioning. It is widely used in various branches of mathematics. When the object (parameters or independent variables) given by a problem cannot be studied in a unified way, we Need to research