“放缩法”它可以和很多知识内容结合,它可以考察学生逻辑思维能力以及分析问题和解决问题的能力.因为放缩必须有目标,而且要恰到好处,目标往往要从证明的结论考察,放缩时要注意适度,否则就不能同向传递.下面结合一些高考试题,例谈“放缩”的基本策略,期望对读者能有所帮助.一、用均值不等式放缩例1已知a、b、c是不全相等的正数.求 It can be combined with a lot of knowledge content, which can examine students’ logical thinking ability as well as the ability to analyze and solve problems.Because scaling must have a goal, but also just right, the goal often from the proof conclusion , Scaling should pay attention to moderation, otherwise it can not be passed with the following combination of some college entrance examination questions, such as talk about the “scaling” of the basic strategy, expect to be able to help the reader.First, with the mean inequality scaling 1 It is known that a, b, c are not equal positive numbers