我们知道,“相等”和“不等”是一对对立关系,一般来说是不可调和的.在各种考试中,我们经常碰到这样一类问题:在不等关系的条件下,需要求一些定值问题或者证明某种等量关系存在.这类问题一般难度较大,学生普遍感到困难,往往难以找到合适的方法来 We know that “equality ” and “” is a pair of antagonistic relations, in general, is irreconcilable.In various exams, we often encounter such a problem: in the unequal relationship between the conditions , There is a need to ask for some valuation problems or to prove that some kind of equivalence exists.This type of problem is generally more difficult and students generally find it difficult to find a suitable method