人们在一些中学数学的刊物上,不时的编拟出某些新的不等式,其实,只要你掌握了换元这种技巧,你便会发现它们只不过是一些常见不等式的变式罢了.本文意在通过实例谈谈三角形不等式与代数不等式的相关性,或许对人们的思维有点启发.1　三角形不等式向代数不等式的转化在多种刊物(如 People publish some new inequalities from time to time in some high school mathematics publications. In fact, as long as you have mastered the technique of changing yuan, you will find that they are just some variants of common inequalities. In discussing the correlation between triangle inequality and algebraic inequality through examples, it may be a little inspiration to people’s thinking.1 The triangular inequality transforms into algebraic inequality in many publications (such as