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={2,3,4}, ={4,5},则A.∩(∁UB)等于( ) A.{4} B.{4,5} {1,2,3,4} {2,3}
={1,3},则 A. {1,3} {2,4,5} {1,2,3,4,5}
={2,3,4}, ={1,2},则(CUB.)等于A.{2} B.{5} {3,4} {2,3,4,5}
=(1,2,5},∁U. =(1,3,5},则A.∩B.=( ) A.{2}B.{5} {1,2,4,5} {3,4,5}
={1,3,5}, ={2,3,4},则 (A.)∩B.=( ) A. {2, 4} B. {3} {2,4,6} {1,2,3,4,5}
∅ {1,3} {2,4,5} {1,2,3,4,5}
={x|x2-3x+2=0}, ={x|x=2a,a∈A.},则集合∁U.(A.∪B.)中元素的个数为( ) A.1B.2 3 4
{1} {3,5} {1,2,4,6} {1,2,3,4,5}
{2,4} {1,3,5} {1,2,3,4,5} ∅
={1,2,3}, ={2,4},则(∁U.A.)∪B.为( ) A.{1,2,4}B.{2,4,5} {0,2,4} {0,2,3,4}
{1} {3,5} {1,2,4,6} {1,2,3,4,5}
∩∁U. ={1,2},∁U.(A.∪B.)={4},则集合B.为( ) A.{3}B.{3,5} {2,3,5} {1,2,3,5}
∅ {1,3} {2,4,5} {1,2,3,4,5}