设全集U=AUB={x属于N*|lgx扫码下载作业帮拍照答疑一拍即得
问题描述:
设全集U=AUB={x属于N*|lgx
扫码下载作业帮
拍照答疑一拍即得
答
∵U=A∪B={1,2,3,4,5,6,7,8,9}
又∵A∩∁UB={1,3,5,7,9},
∴∁UB={1,3,5,7,9},
∴B={2,4,6,8},
故填:{2,4,6,8}.