A、<img width="94" height="22" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/6f72bd7f-c552-4dbe-9b1b-dd575c76ea00.png">
B、<img width="88" height="26" id="图片 38" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/c6476f7f-a97d-486f-a01c-a6a9f9de1b6c.png" alt="说明:HWOCRTEMP_ROC00">
C、<img width="96" height="22" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/c90d1151-7410-402d-a45e-ec7678ffba1a.png">
D、<img width="92" height="29" id="图片 37" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/b7a1af02-783b-432b-9106-5c7e153a2ede.png" alt="说明:HWOCRTEMP_ROC10">
A、<img width="89" height="20" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/4b6048dc-40c3-4bc3-8f7a-ca956433393f.png">
B、<img width="113" height="33" id="图片 38" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/c8f5e710-245b-4b53-ab87-40282a0de0e2.png" alt="说明:HWOCRTEMP_ROC00">
C、<img width="92" height="23" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/747ec043-2871-463b-be20-a1ffc53c3089.png">
D、<img width="114" height="36" id="图片 37" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/8629295f-15e9-4042-bc11-c393039f29dd.png" alt="说明:HWOCRTEMP_ROC10">
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正确答案
试题解析
解不等式3x+1≥0,得集合
,集合B={x|x<1},所以
.