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={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}
={1,2,3}, ={x|(x﹣3)(x﹣6)=0},则A.∩B.等于( ) A.{1}B.{2,3} {3,6} {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}
={1,2,3,4,5}, =[3,+∞),则图X11中阴影部分所表示的集合为( ) 图X11 A.{0,1,2}B.{0,1} {1,2} {1}
{-2,-1,0,1,2,3} {-2,-1,0,1,2} {1,2,3} {1,2}
={x|(x-1)(x+2)=0}; ={x|(x+2)(x-3)=0},则集合A.∪B.是( ) A.{-1,2,3} B.{-1,-2,3} {1,-2,3} {1,-2,-3}
={1,2,3}, ={(x,y)|x∈A.,y∈A.,x+y∈A.},则B.中所含元素的个数为( ) A.2B.3 4 6
={x|x2﹣4<0}, ={1,2,3},则A∩B.=( ) A.{1,2,3} B.{1,2} {1} {2}
{1} {1,2} {0,1,2,3} {1,2,3}
={1,2,3,4,5}, ={x|x<2},则A.∩B.等于( ) A.{1}B.{1,2} {1,2,3} {1,2,3,4}
={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}
={x|x≥3}, ={1,2,3,4,5}则A.∩B.=( ) A.{1,2,3}B.{2,3,4} {3,4,5} {1,2,3,4,5}
M.⊆N N=M M∩N={2,3} M∪N={1,4}
{2,3} {1,2,3} {1,-1,2,3} {2,3,x,y}