全集U={1,2,3,4,5,6,7,8,9},A∩B={2},CuA∩CuB={1,9},CuA∩B={4,6,8},则A=?
问题描述:
全集U={1,2,3,4,5,6,7,8,9},A∩B={2},CuA∩CuB={1,9},CuA∩B={4,6,8},则A=?
答
A={2,3,5,7},
全集U={1,2,3,4,5,6,7,8,9},A∩B={2},CuA∩CuB={1,9},CuA∩B={4,6,8},则A=?
A={2,3,5,7},