A、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/3da8452f-89cf-44df-a54b-18c76109a8f7.png">可大于也可等于2
B、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/3da8452f-89cf-44df-a54b-18c76109a8f7.png">＞2
C、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/3da8452f-89cf-44df-a54b-18c76109a8f7.png">可小于也可等于2
D、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/3da8452f-89cf-44df-a54b-18c76109a8f7.png">＜2
A、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/bd650d9a-84de-4097-8a71-cc8f5a2f2b45.png">可大于也可等于2
B、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/bd650d9a-84de-4097-8a71-cc8f5a2f2b45.png">＞2
C、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/bd650d9a-84de-4097-8a71-cc8f5a2f2b45.png">可小于也可等于2
D、<img width="41" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/bd650d9a-84de-4097-8a71-cc8f5a2f2b45.png">＜2
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正确答案
试题解析
直接利用不等式公式
，或者
，因为a，b都是正实数，所以
，所以
．
