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在各级各类的考试中,关于函数的内容是占有较大比重的,深刻理解函数的有关概念和性质是解题的关键.下面通过比较和辨析函数中几点易混淆的问题,帮助同学们加强对函数相关概念的理解和判别. 一、定义域与值域
In various types of examinations, the content of the function occupies a large proportion, and a deep understanding of the concept and nature of the function is the key to solving the problem. The following is to help students by comparing and discriminating several confusing questions in the function. We strengthen the understanding and discrimination of the concepts related to functions. I. Domains and domains