确定恒成立不等式中参数的取值范围,既是学习的重点,又是各级各类测试的热点,本文就此类问题的求解方法综述于后.一、判别式法例1已知奇函数f(x)在实数集R上是减函数,若对任意的x∈R,不等式f(ax~2-1)+ f(2-ax)<0恒成立,求实数a的取值范围. It is not only the key point of learning, but also the hotspot of various types of tests at all levels. Determining the solution of this kind of problem is reviewed later. I. Discriminant Formula 1 Known odd function f(x) ) is a decrement function on the set R of real numbers. If for any x∈R, the inequality f(ax~2-1)+f(2-ax)<0 is true and the range of real numbers a is obtained.