一般来说,对数学定义、定理等知识的掌握要通过做题来进行巩固.但在做题过程中,同学们常常受到思维障碍,似曾相识的题目却感觉无从入手.所以解题要应用适当的方法,对题目的条件进行再分析、变形,使问题变化、引伸,再寻求适当的方法,从而彻底掌握.大家下面看这样一道题目: In general, the mastery of mathematical definitions, theorems, and other knowledge must be consolidated by doing questions. But in the process of doing questions, the students are often subject to obstacles in thinking, and the problems that are familiar to each other are nowhere to be found. Therefore, the problem should be applied properly. Methods: Reanalyze and distort the conditions of the topic to make changes and extensions to the problem and then seek appropriate methods so as to thoroughly grasp it. We will look at such a topic as follows: