发布时间 : 星期六 文章2019年全国及各省市高考数学试题分类汇编(01 集合)更新完毕开始阅读027787b02bf90242a8956bec0975f46526d3a746
2019年全国及各省市高考数学试题分类汇编(01 集合)
A?{2,3,4,5},B?{2,3,6,7},1.(2019·全国I文·已知集合U?{1,2,3,4,5,6,7},则B?CUA?2)
( )
A.{1,6} B.{1,7} C.{6,7} D. {1,6,7} 答案:C
6,7},又?B?{2,3,4,5},则CUA?{1,3,6,7},则解析:?U?{1,2,3,4,5,6,7},A?{2,B?CUA?{6,7},故选C.
22.(2019·全国I理·1)已知集合M?{x|?4?x?2},N?{x|x?x?6?0},则M?N?( )
A.{x|?4?x?3} B.{x|?4?x??2} C. {x|?2?x?2} D. {x|2?x?3} 答案:C
解答:由题意可知,N?{x|?2?x?3},又因为M?{x|?4?x?2},则M?N?{x|?2?x?2},故选C.
3.(2019·全国II文·1)设集合A??x|x?-1?,B??x|x?2?,则AA.(?1,??) B.(??,2) C.(?1,2) D.? 答案:C
B?( )
(?1,2)解析:A??x|x?-1?,B??x|x?2?,∴A?B?.
4.(2019·全国II理·1)设集合A?x|x?5x?6?0,B??x|x?1?0?,则A2??B?( )
A.(??,1) B.(?2,1) C.(?3,?1) D.(3,??) 答案:A
解答:A??x|x?2或x?3?,B??x|x?1?,∴A. B?(??,1)25.(2019·全国III文·1)已知集合A?{?1,0,1,2},B?{x|x?1},则AA.{?1,0,1} B.{0,1} C.{?1,1} D.{0,1,2} 答案:A
解答:B?{x|x?1}?{x|?1?x?1},所以A?B?{?1,0,1}.
6.(2019·全国III理·1)已知集合A?{?1,0,1,2},B?{x|x?1},则AA.{?1,0,1} B.{0,1} C.{?1,1} D.{0,1,2} 答案:A
22B?( )
B?( )
解答:B?{x|x?1}?{x|?1?x?1},所以A2B?{?1,0,1}.
7.(2019·北京文·1)已知集合A?{x|?1?x?2},B?{x|x?1},则AA.(?1,1) B.(1,2) C.(?1,??) D.(1,??) 答案:C
解析:由题意知,AB?( )
B?(?1,??),故选C.
8.(2019·天津文/理·1)设集合A?{?1,1,2,3,5},B?{2,3,4},C?{x?R|1?x?3},则
(AC)B?( )
A.{2} B.{2,3} C.{?1,2,3} D.{1,2,3,4} 答案:D 解答:AC?{1,2},(AC)B?{1,2,3,4},故选D.
9.(2019·浙江·已知全集U?{?1,0,1,2,3},集合A?{0,1,2},B?{?1,0,1},则(CUA)1)( )
A.{?1} B.{0,1} C.{?1,2,3} D.{?1,0,1,3} 答案:A
解答:CUA?{?1,3},则(CUA)B?B?{?1}.
11.(2019·江苏·1)已知集合A?{?1,0,1,6},B?{x|x?0,x?R},则A答案:{1,6}
解答:因为A?{?1,0,1,6},B?{x|x?0,x?R},所以AB? . B?{1,6},
12.(2019·上海·1)已知集合A?(??,3),B?(2,??),则A答案:(2,3) 解答:A
B? . B?(2,3).