在函数与方程问题中,可以把函数的零点、方程的根等问题转化为两个函数图象交点的问题,依据函数图象的特征,利用区间端点处的函数值、函数的极值等构造关于参数的不等式求解.本文例说如下.例1设函数 In the function and equation problems, the zero point of the function and the root of the equation can be transformed into the problem of the intersection of two function images. According to the characteristics of the function image, by using the function value at the end of the interval and the extreme value of the function On the parameters of the inequality .This article is as follows. Example 1 Let function