函数与方程是两个不同的概念,但它们之间有着密切的联系。就中学数学而言,函数思想在解题中的应用主要表现在两个方面:一是借助有关初等函数的性质,解有关求值、解(证)不等式、解方程以及讨论参数的取值范围等问题;二是在问题的研究中,通过建立函数关系式或构造中间函数,把所研究的问题转化为讨论函数的有关性质,达到化难为易,化繁为简的目的。 Functions and equations are two different concepts, but there is a close relationship between them. For middle school mathematics, the application of functional thinking in solving problems is mainly manifested in two aspects: First, with the help of the properties of elementary functions, solving the evaluation, solution inequalities, solving equations and discussing the range of parameters Second, in the research of the problem, through the establishment of a functional relation or the construction of an intermediate function, the problem under study is transformed into the relevant properties of the discussion function, so as to achieve the goal of simplifying and simplifying the problem.