在数学教学过程中,我们通常会遇到诸如求间断点、值域之类的难题,学生对解题的关键部分很难牢固地掌握和记忆,教师不妨讲一些选学内容中的函数的极限的初步知识,并在解题过程中巧妙地穿插,学生易于接受理解,有时甚至会产生意外的惊讶. In the process of mathematics teaching, we often encounter difficulties such as finding discontinuity points and value ranges. Students are difficult to master and remember the key parts of problem solving. Teachers may wish to talk about the limits of the functions in the selection of learning content. The initial knowledge, and skillfully interspersed in the process of solving questions, students are easy to understand, and sometimes even have unexpected surprises.