题目内容
(本小题满分8分)
设全集U="{1," 2, 3, 4, 5}, 集合A="{1," a2-1, 4}, ="{2," a+3}
(I)求a值;
(II)满足AÍBU这样的集合B共有几个?试将这样的B集合都写出来
(I)2
(II) 分别是: {1, 3, 4}或{1, 2, 3, 4}或{1, 3, 4, 5}
解析
练习册系列答案
相关题目
题目内容
(本小题满分8分)
设全集U="{1," 2, 3, 4, 5}, 集合A="{1," a2-1, 4}, ="{2," a+3}
(I)求a值;
(II)满足AÍBU这样的集合B共有几个?试将这样的B集合都写出来
(I)2
(II) 分别是: {1, 3, 4}或{1, 2, 3, 4}或{1, 3, 4, 5}
解析