函数是高中数学的核心内容,许多知识都可以与函数建立联系,并且都是围绕函数这一主线展开的.每年的高考对函数的考查都占有较大的比例,尤其是“导数”进入中学教材后,研究函数的方法更灵活简便,拓宽了高考在函数上的命题空间,不断有新题、好题涌出. Functions are the core content of high school mathematics, and many of the knowledge can be linked with functions, and they are all centered around the main line of functions. Each year the college entrance examination has a large proportion of the examination of the function, especially the “derivative” entry. After the middle school textbooks, the methods for studying functions are more flexible and simpler, broadening the proposition space of the college entrance examination on the function, and constantly finding new and good questions.