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{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
(1)(2)(3) (2)(3)(4) (1)(3)(4) (1)(2)(3)(4)
)∪B=( ) A.{2} {1,2,3} {1,3} {0,1,2,3,4}
[-4,+∞) (-2, +∞) [-4,1] (-2,1]
{1,3,1,2,4,5} {1} {1,2,3,4,5} {2,3,4,5}
(1,-1) (-1,1) (-4,6) (4,-6)
={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}
2 -4或2 -1
={1,3}, ={2,3,4},则(CUA)∩(CUB)=A.{1}B.{5} {2,4} {1,2,4,5}
={1,2}, ={2,4},则 U.(A.∪B.)=( ) A.{2} B.{3} C.{1,2,4} {1,4}
={1,2}, ={2,4},则∁U.(A.∪B.)=( ) A.{2}B.{3} {1,2,4} {1,4}
(1)(2) (1)(3) (2)(3) (2)(4)