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函数是中学数学课程中的主要内容之一,是由初等数学进入高等数学的枢纽,可以研究的课题很多。笔者在教学过程中深感函数定义域的重要性,因此针对学生满足于只要会根据函数解析式求定义域就行了的片面想法,我在教学中注意了函数定义域在推理论证中的地位与作用,从而使学生不但加深了对函数概念的理解,也提高了解题能力。
The function is one of the main contents in the middle school mathematics curriculum, and it is the hub for entering advanced mathematics from elementary mathematics. There are many topics that can be studied. In the process of teaching, the author deeply feels the importance of the function definition domain. Therefore, for the students to be satisfied with the one-sided idea that the domain will be defined according to the function analysis formula, I have paid attention to the position of the function definition domain in the inference theory. The role, so that students not only deepen the understanding of the concept of the function, but also improve the ability to understand.