全集U={1,2,3,4,5,6,7,8,9},(CuA)∪(CuB)={2,3,4,6,7,8},(CuA)∩B={3,7},(CuA)∪B={1,3,5,6,7,8,9}.求A,B.

问题描述:

全集U={1,2,3,4,5,6,7,8,9},(CuA)∪(CuB)={2,3,4,6,7,8},(CuA)∩B={3,7},(CuA)∪B={1,3,5,6,7,8,9}.
求A,B.

A={1,2,4,5,9}
B={1,3,5,7,9

A={1,2,4,5,9}
B={1,3,5,7,9}