Question

已知全集U={小于10的正自然数},其子集A,B满足A∩B={2},CuA∩B={4,6,8},CuA∩CuB={1,9

Answer 1

∵A∩B={2},CuA∩B={4,6,8}

∴B={2,4,6,8}

∵CuA∩CuB={1,9}

∴1,9不属于A,B

∴A={0,2,3,5,7}