1设集合U=R,集合A=｛x丨x≥0｝,B=｛y丨y≥1｝,则CuA与CuB之间的关系是什么? 2.已知A=｛2a≤x≤a+3｝,B
1设集合U=R,集合A=｛x丨x≥0｝,B=｛y丨y≥1｝,则CuA与CuB之间的关系是什么?
2.已知A=｛2a≤x≤a+3｝,B=｛x丨x＜-1或x＞5｝,若A∩B=∅,求a取值范围
人气：319 ℃ 时间：2020-05-18 22:00:10
解答
1,CuA={x|x3.
2)2a>=-1且a+3
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