已知A∩B={3},9(CuA)∩B={4,6,8},A∩(CuB)={1,5},(CuA)U(CuB)={x|x扫码下载作业帮拍照答疑一拍即得
问题描述:
已知A∩B={3},9(CuA)∩B={4,6,8},A∩(CuB)={1,5},(CuA)U(CuB)={x|x
扫码下载作业帮
拍照答疑一拍即得
答
9(CuA)∩B={4,6,8},中的9是打多的吧
A∩B={3},(CuA)∩B={4,6,8},得B中有{3,4,6,8}
A∩B={3},A∩(CuB)={1,5},得A中有{1,3,5}
(CuA)U(CuB)={x|x所以A={1,3,5},B={3,4,6,8}
(AUB)={1,3,4,5,6,8}
Cu(AUB)={2,7,9}