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高中数学教学中,含参问题是一类重要问题,同时对学生而言,无论是高一的新生还是高三的考生,它都是难点。含参问题的解决往往需要分类讨论,而分类讨论也是学生学习的难点。其难点在于:一是何时需要分类讨论,二是分类讨论的对象是什么,三是分类讨论后的参数范围究竟取交集还是并集。因此,在日常解题教学中,引导学生仔细审题,利用题目的条件优化解题过程有着重要的实际意义。下面笔者
In senior middle school mathematics teaching, the question of attending senate is a kind of important question, at the same time it is difficult for the student whether it is a freshman or a senior of a freshman. The solution of ginseng problem often needs classification discussion, and the classification discussion is also a difficult point for students to learn. The difficulties are: First, when the need for classification and discussion, and second, what is the object of the classification discussion, the third is after discussion of the classification of the parameters of the range of whether to take intersection or union. Therefore, in everyday problem-solving teaching, it is of great practical significance to guide students to carefully examine questions and use the conditions of the topic to optimize the process of solving problems. The author below