在初等数学中,证明不等式的方法、技巧较多,但遇到一些无从下手,很难找到切入点的不等式的证明时,我们不妨变换一下思维角度,运用函数思想,从所证不等式的结构特征出发,恰当构造函数,合理借助函数的单调性、最值等,使不等式得以证明. In elementary mathematics, there are many ways and means to prove inequalities. However, when we find it difficult to find the inequality proof that we can not find the starting point, we may change the thinking point of view and use the function idea to analyze the structural features of the certified inequalities Starting, the appropriate constructor, a reasonable use of monotonicity of the function, the most value, so that inequalities can be proved.