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{3,4} {1,2} {2,3,4} {1,2,3,4}
={1,2,3}, ={2,3,4},则∁U.(A.∩B.)=( ) A.{2,3}B.{1,4,5} {4,5} {1,5}
={1,2}, ={1,2,3}, ={2,3,4},则(A∩B.)∪C.= ( ) A.{1,2,3} B.{1,2,4} C.{2,3,4} {1,2,3,4}
={1,2}, ={2,3,4},那么集合A.∩B.等于( ) A.{2}B.{2,3} {1,2,3} {1,2,3,4}
{1,2,4} {2,3,4} {1,2} {1,2,3,4}
{1,2,3} {1,2,4} {2,3,4} {1,2,3,4}
={1,2,3}, ={2,3,4},则∁U.(A.∩B)=( ) A.{2,3}B.{1,4,5} {4,5} {1,5}
={x|x2﹣4<0}, ={1,2,3},则A∩B.=( ) A.{1,2,3} B.{1,2} {1} {2}
={1,2,3},集合 ={2,3,4},则A.∩B.等于( ) A.{2,3}B.{1,2} {3,4} {1,2,3,4}
{1,2,3} {2,3} {1,2} {2,3,4}
{1,2,3,4} {1,2,3} {2,3,4} {1,3,4}
{1,2,3,4} {1,2,3} {2,3,4} {1,3,4}
={1,2}, ={1,2,3},C={2,3,4}则 ( ) (A.) {1,2,3} (B.) {1,2,4} ( ) {2,3,4} ( ) {1,2,3,4}
={1,2,3}, ={2,3,4},则A.∪B.=( ) A. {1,2,3,4} B. {1,2,3} {2,3,4} {1,3,4}