已知全集U={1,2,3,4,5,6,7,8},A={1,4,6},B={4,5,7},则(CuA)∩(CuB)=?A,{2,3,4,8},B,{2,3,8}C,{2,4,8}D{3,4,8}
问题描述:
已知全集U={1,2,3,4,5,6,7,8},A={1,4,6},B={4,5,7},则(CuA)∩(CuB)=?A,{2,3,4,8},B,{2,3,8}C,{2,4,8}D{3,4,8}
答
CuA = {2,3,5,7,8}
CuB = {1,2,3,6,8}
(CuA)∩(CuB)={2,3,8}
所以选 B请采纳,谢谢!此外,还有一种做法,补之交等于并之补,AB取并集再做补集,也能得到答案AUB={1, 4, 5, 6, 7}
(CuA)∩(CuB)=Cu(AUB)={2, 3, 8}