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{1} {2,3} {1,2,4} {2,3,4}
={1,2}, ={2,3},则( ) A.{4,5} B.{2,3} {1} {2}
={x|x2-2x-3≥0},B={x|-2≤x<2},则=( ) A. (-1,2) [-2,3) [-2,-1] [-1,2]
={1,2}, ={2,3},则∁U.(A.∪B.)等于( ) A.{1,3,4}B.{3,4} {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}
∩ = A.(﹣∞,3)B.[2,3) (﹣∞,2) (﹣1,2)
[2,3] (-2,3] [1,2) (-∞,-2]∪[1,+∞)
={1,2,3,4}, ={x|x=n2,n∈A.},则A.∩B.=( ) A.{1,4} B.{2,3} {9,16} {1,2}
∩ = A.(﹣∞,3)B.[2,3) (﹣∞,2) (﹣1,2)
={1,2}, ={2,3},则∁U.(A.∪B.)=( ) A. {1,3,4}B. {3,4} {3} {4}
M.={(3,2)},N.={(2,3)} M.={3,2},N.={2,3} M.={(x,y)|x+y=1},N.={y|x+y=1} M.={1,2},N.={(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}
{1,3} {2,3} {1,2} {1,2,3}
={1,2}, ={2,3},则( ) A.{4,5} B.{2,3} {1} {2}
={1,2}, ={2,3},则∁U.(A.∪B.)=( ) A.{1,3,4}B.{3,4} {3} {4}
[2,3] ( -2,3 ] [1,2)