摘要：26．已知集合U={1,2,3,4,5,6,7}, A={2,4,5,7},B={3,4,5},则(uA)∪(uB)=(A){1,6} (B){4,5} (C){1,2,3,4,5,7} (D){1,2,3,6,7}解析:已知集合.(uA) ={1.3.6}.(uB) ={1.2.6.7}.则(uA)∪(uB)＝{1.2.3.6.7}.选D.
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已知集合U={1,2,3,4,5,6,7}, A={2,4,5,7},B={3,4,5},则(
uA)∪(uB)=
(A){1,6} (B){4,5} (C){1,2,3,4,5,7} (D){1,2,3,6,7}
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A)∩(
B)等于( )