函数是高中数学最基本的内容,解析式是函数的三个要素之一,故它是研究函数的常见问题,其中以求给定区间上的函数解析式为多见,小题大题均会出现,而同学们在求解时感到棘手,经常出错,其实这类题的关键是区间转换,下面笔者通过几道例题谈谈关于给定区间上函数解析式的求解策略,供大家参考. Function is the most basic content of high school mathematics. Analytic expression is one of the three elements of the function. Therefore, it is a common problem in the study of functions. In order to find the function analysis formulas for a given interval, most of them are common. Appeared, and the students are troubled in the solution, often mistakes, in fact, the key to such a problem is the interval conversion, the following author through several examples to talk about a given range of functional analytical solution strategy for your reference.