高中数学代数与函数一其他练习题140
题目内容

下列结论正确的是

2021-07-21

A.当a>0且x≠1时,lgx+http://picflow.koolearn.com/upload/papers/g02/20110517/201105171042308341005.gif≥2

B.当x>0时,http://picflow.koolearn.com/upload/papers/g02/20110517/20110517104230834917.gif+http://picflow.koolearn.com/upload/papers/g02/20110517/20110517104230850961.gif≥2

C.当x≥2时,x+http://picflow.koolearn.com/upload/papers/g02/20110517/20110517104230866912.gif的最小值为2

D.当0<x≤2时,x-http://picflow.koolearn.com/upload/papers/g02/20110517/20110517104230881912.gif无最大值

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