用参数法证明不等式,思路新颖自然,操作简捷,应用广泛.基本思路是引入参数,建立与结论形式相似的不等式(多采用平均值不等式),然后赋值(多为平均值不等式成立条件),消去参数,实现所建不等式特殊化,从而得证. Using the parametric method to prove inequality, the idea is novel and natural, simple operation, and wide application. The basic idea is to introduce parameters, establish an inequality similar to the form of the conclusion (usually using the average inequality), and then assign (mostly the conditions for the establishment of the average inequality), eliminate Parameters, to achieve specialization of the built inequality, and thus obtained.