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{3} {2,3} {x|x≥2} {0,1,2,3}
{0} {2,3} {1,2,3} {0,1,2,3}
={1,2,3}, ={x|(x+1)(x-2)<0,x∈Z.},则A.∪B.=( ) A.{1} B.{1,2} {0,1,2,3} {-1,0,1,2,3}
={1,2,3}, ={x|(x+1)·(x-2)<0,x∈Z.},则A.∪B.= ( ) A.B.{1,2} {0,1,2,3} {-1,0,1,2,3}
{1} {1,2} {0,1,2,3} {﹣1,0,1,2,3}
{1} {1,2} {0,1,2,3} {-1,0,1,2,3}
={x | x2 -x-6≤0}, ={x|>0},那么集合A (CUB.)= A.{x|-2≤x<4}B.{x|x≤3或x≥4} {x|-2≤x≤0} {x|0≤x≤3}
{1,2,3} {0,1,2,3} {-2,-1,0,1,2} {-3,-2,-1,0,1,2,3}
{1} {1,2} {0,1,2,3} {﹣1,0,1,2,3}
{0,1,2,3} {2} {﹣1,0,1,2} ∅
={0,1,2,3}, ={x|lnx>0},则A.∩B.=( ) A.{0,1,2,3}B.{1,2,3} {2,3} {3}
={0,1,2,3}, ={x|x(x-3)<0},则A.∩B.= ( ) A.{0,1,2,3}B.{0,1,2} {1,2} {1,2,3}
{0,1,2} {﹣1,0,1,2} {﹣1,0,2,3} {0,1,2,3}
{0,1,2} {2,3} {0,1,2,3}
{3} {0,1,2} {1,2} {0,1,2,3}
{1,2} {0,1,2} {0,1,2,3} ∅
={1,2,3}, ={x|﹣1<x<3,x∈Z.},则A.∪B.等于( ) A.{1}B.{1,2} {0,1,2,3} {1,2,3}
{0,1,2} {2,3} {0,1,2,3}
{2} {1,2} {0,1,2} {0,1,2,3}