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函数是整个高中数学的重点,函数思想是最重要的数学思想方法,函数问题在历年的高考中都占有相当大的比例.从近几年的高考试题来看,对本部分内容的考查,稳中求变,向着更灵活的方向发展.对于函数的概念及表示多以下面的形式出现:通过具体问题(几何问题、实际应用问题)找出变量间的函数关系,再求出函数的定义域、值域,进而研究函数的性质,寻求问题的结果.
Function is the focus of the whole high school mathematics, the function idea is the most important mathematical thinking method, function problem has occupied a considerable proportion in the college entrance examination over the years. From the high exam questions in recent years, the content of this part of the examination, stable To change, to develop in a more flexible direction. The concept and representation of the function appear in the following form: Through the specific problem (geometric problems, practical application problems) to find out the function relationship between variables, and then find the domain of the function, Value domain, then study the nature of the function, seek the results of the problem.