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含参不等式恒成立与函数零点问题是近几年高考的热点问题,解决含参不等式恒成立问题的思路一:将不等式问题转化为求最值问题.但有时会遇到最大值最小值点不好求的情况,导致无法求出最值或极值.思路二:分离参数,再求函数的最值.有时也会遇到参数不好分离或者最值不好求的情况.解决函数零点问题通常是直接求函数图象与x轴的交点或者转化为求方程的根,往往无法直接求出.如何解决此类问题,笔者
Constant inequality with function inequality and function zero problem are the hot issues in college entrance examination in recent years. To solve the problem of constitutive equation with constant inequality, one idea is to convert the inequality problem to the most value problem, but sometimes it will encounter the maximum minimum value Good seeking situation, leading to not be able to find the value of the most or the idea of two: separation of parameters, and then seeking the value of the function, and sometimes met the parameters of the separation is not good or worst not seeking the situation. It is often directly seeking the intersection of the function image and the x-axis or transforming it into the root of the equation, and it is often impossible to find out directly how to solve such problems.