摘要：9．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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已知集合U={1,2,3,4,5,6,7},A={2,4,5,7},B={3,4,5},则(
A)∪(
B)等于( )
A)∪(B)等于( )A.{1,6} B.{4,5} C.{2,3,4,5,7} D.{1,2,3,6,7}
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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(
A)∩B等于
A)∩B等于A.{1,6} B.{3} C.{2,3,4,5,7} D.{1,3,4,6,7}
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uA)∪(
=___ _