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={1,2,4}, ={2,3,4},则=( ) A.{2, 4} B.{1,3} {1,2,3,4}
{2} {2,3} {-1,2,3} {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}
={1,2,3,4,5},集合 ={﹣2,2,3,4,5,9},则集合A.∩B.=( ) A.{2,3,4}B.{2,3,4,5} {1,2,3,4,5} {﹣2,1,2,3,4,5}
{2,3,4} {0,2,3,4,5} {0,5} {3,5}
{1,2,4} {2,3,4} {0,2,4} {0,2,3}
{1,2,3} {1,2,4} {2,3,4} {1,2,3,4}
A∩B={1,3,4} A∪B={2,3,4} {1}∈A 1∈A
={1,2,3}, ={2,3,4},则∁U.(A.∩B)=( ) A.{2,3}B.{1,4,5} {4,5} {1,5}
={1,2,3,4}, ={x∈R.|1<x≤4},则A.∩B.=( ) A.{1,2,3,4}B.{2,4} {2,3,4} {x|1<x≤4}
={1,3}, ={2,3,4},则(CUA)∩(CUB)=A.{1}B.{5} {2,4} {1,2,4,5}
{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}
={4,5,6}, ={2,3,4],则A.∪B.中有( )个元素. A.1B.4 5 6
={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}