高中数学代数与函数一其他练习题131
题目内容

设a,b,c是互不相等的正数,则下列等式中不恒成立的是

2021-07-20

A.|a-b|≤|a-c|+|b-c|

B.a2+http://picflow.koolearn.com/upload/papers/g02/20110815/20110815134859718972.gif≥a+http://picflow.koolearn.com/upload/papers/g02/20110815/20110815134859734943.gif

C.|a-b|+http://picflow.koolearn.com/upload/papers/g02/20110815/201108151348597341055.gif≥2

D.http://picflow.koolearn.com/upload/papers/g02/20110815/201108151348597811668.gif

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