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={0,1,2,3}, ={1,2,4},则集合A.∪B.= ( ) A.{0, 1,2,3,4}B.{1,2,3,4} {1,2} {0}
{2} {1,2,4,6} {1,2,4} {2,6}
={0,1,2,3}, ={1,2,4},则集合AB= ( ) A.{0,1,2,3,4}B.{1,2,3,4} {1,2} {0}
{2} {1,2,4} {1,2,4,6} {2,4}
{1,2,4} {2,3,4} {0,2,4} {0,2,3}
={1,2,4},则集合 ={(x,y)|x∈A.,y∈A.}中元素的个数为 A.3B.6 8 9
到集合 的一一映射,若A.={1,2,4},则A.∩B.等于( ) A.{1} B.{2} {1,2} {1,4}
={1,2,4},集合 ={3,6},则∁U.(A.∪B.)=( ) A.{1,2,4}B.{1,2,4,5} {2,4} {5}
{1,2,3,4,5} {1,4} {1,2,4} {3,5}
{1,2,3} {1,3,4} {1,2,4} {2,3,5}
={3,a2},集合 ={0,b,1-a},且A.∩B.={1},则A.∪B.=( ) A.{0,1,3}B.{1,2,4} {0,1,2,3} {0,1,2,3,4}
{4} {1,4} {2,3} {1,2,3,4}
={0,1,2,3},B={1,2,4},则集合A.∪ = A.{0,1,2,3,4} B.{1,2,3,4} {1,2} {0}
={1,2}, ={2,4},则 U.(A.∪B.)=( ) A.{2} B.{3} C.{1,2,4} {1,4}
{2,4} {1,2,4} {2,4,8} {1,2,8}
={1,2}, ={2,4},则∁U.(A.∪B.)=( ) A.{2}B.{3} {1,2,4} {1,4}
={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}