函数的奇偶性是函数的重要性质之一 ,其应用十分广泛 .本文要介绍函数的奇偶性在求函数解析式、比较函数值大小等方面的应用 ,以及如何构造奇偶函数解决一些方程、不等式或参数值的问题 .供学习参考 .一、利用奇偶函数确定对称区间上的单调性规律 :奇函数在对称区间上单调性相? The parity of the function is one of the important properties of the function, and its application is very extensive. This paper will introduce the application of the parity of the function in the analysis of the function, the value of the value of the comparison function, and how to construct the parity function to solve some equations, inequalities or The problem of parameter values. For learning reference. First, use the odd-even function to determine the monotonicity law on the symmetry interval: Odd function in the symmetry interval monotonous phase?