设A={x|x是小于9的正整数},B={1,2,3},c={3,4,5,6},求AnB,Anc,An(BUC),AU(BnC,_数学解答

设A={x|x是小于9的正整数},B={1,2,3},c={3,4,5,6},求AnB,Anc,An(BUC),AU(BnC,

人气：236 ℃　时间：2020-05-28 17:03:30

解答

1、A交B={1,2,3}
2、A交C={3,4,5,6}
3、A交(B并C）={1,2,3,4,5,6}
4、A并（B交C）={1,2,3,4,5,6,7,8}