对于含有参数a的不等式f(x)≤0(包括不等式f(x)≥0)恒成立或方程f(x)=0恒有实根问题,若对参数或变量进行讨论,再结合函数的图像求解一般都较难或繁,而通过分离系数巧用“求函数最值”的方法便可以简解此类问题,由于在转化与化归时常需分离出系数a,不妨称之为“分离系数法”. For constant inequality problems where f(x) ≤ 0 (including inequality f(x) ≥ 0) or constant f(x) = 0 with a parameter a, if a parameter or variable is discussed, combine the function Image solving is generally more difficult or complicated, and the method can be used to solve these problems by separating the coefficients and using the method of “finding the function’s maximum value”. Since it is often necessary to separate the coefficient a when converting and converting, it may be called “Separation coefficient method”.