我们知道,在运用二元均值不等式(a+b)/2≥(ab)～1/2(或a+b≥(ab)～1/2求解最值问题时,常常出现等号不成立的情况,这时必须另外探寻变形的方法.拆项法就是破解这类问题的快速通道,拆项的目的还是使不等式中的等号成立,以便求出最值.大家从以下示例中能够学到一些拆项的方法。 We know that when we use the bivariate mean inequality (a+b)/2≥(ab)~1/2 (or a+b≥(ab)～1/2) to solve the problem of the most value, it often happens that the equal sign does not hold. At this time, the method of deformation must be additionally explored. The demolition method is a fast way to solve this kind of problem. The purpose of the demolition is to make the equal sign in the inequality to be established in order to find the best value. We can learn some from the following examples. Demolition method.