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={x|x+1>0}, ={-2,-1,0,1},则(∁R.A.)∩B.=( ) A.{-2,-1}B.{-2} {-1,0,1} {0,1}
={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}
={x|﹣1<x<2}, ={x|x2+2x≤0},则A.∩B.=( ) A.{x|0<x<2}B.{x|0≤x<2} {x|﹣1<x<0} {x|﹣1<x≤0}
{-2,-1,0,1} {-3,-2,-1,0} {-2,-1,0} {-3,-2,-1}
={x|x2-x-2≤0},集合 为整数集,则A.∩B.=( ) A.{-1,0,1,2}B.{-2,-1,0,1} {0,1} {-1,0}
={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}
={x|x>1}, ={x|x2﹣2x<0},则A.∪B=( ) A.{x|x>0}B.{x|x>1} {x|1<x<2} {x|0<x<2}
={x|x2+x>2}, ={x|2x<1},则(∁R.A.)∩B等于( ) A.[0,1]B.(﹣2,1) [﹣2,0) [﹣1,0]
={﹣1,0,1,2}, ={x|x<2},则A.∩B.=( ) A.{﹣1,0,1}B.{﹣1,0,2} {﹣1,0} {0,1}
={-2,-1,0,2}, ={x|(X-1)(x+2)<0},则A.∩B= (A.){--1,0} (B.){0,1} ( ){-1,0,1} ( ){,0,,1,2}
{0,1} {0,1,2} {-1,0,1} {-1,0,1,2}
f(x﹣1)=2x+2(0≤x≤2) f(x﹣1)=﹣2x+1(2≤x≤4) f(x﹣1)=2x﹣2(0≤x≤2) f(x﹣1)=2x﹣1(2≤x≤4)
2x-y-1=0 2x+y+1=0 2x-y+1=0 2x+y-1=0
f(x-1)=2x+2(0≤x≤2) f(x-1)=2x-1(2≤x≤4) f(x-1)=2x-2(0≤x≤2) f(x-1)=-2x+1(2≤x≤4)
={-2,-1,0,1,2},B={x|(x -1)(x+2)<0},则A.∩B=( ) A. {--1,0} {0,1} {-1,0,1} {,0,,1,2}
={x|x+1>0}, ={﹣2,﹣1,0,1},则(∁R.A.)∩B=( ) A.{﹣2,﹣1}B.{﹣2} {﹣2,0,1} {0,1}