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={x|(x﹣1)(x+2)>0},集合 ={﹣3,﹣2,﹣1,0,1,2},则A.∩B.等于( ) A.{0,1}B.{﹣3,﹣2} {﹣3,2} {﹣3,﹣2,1,2}
={x|ax2+2x+a=0,a∈R.},若集合A.有且仅有2个子集,则实数a的取值是( ) A.1 0,1 -1, 1 -1,0,1
(﹣2,1) [﹣2,1] {﹣2,0,1} {0,1}
{x|﹣1<x<2} {x|0<x<1} {﹣1,0,1} {0,1}
{﹣2,1} {﹣1,2} {﹣2,0,1} {﹣2,﹣1,0,1,2}
{1,2} {x|x≤1} {﹣1,0,1} R.
={x|x≥0},且A.∩B=B,则集合 可能是( ) A.{1,2}B.{x|x≤1} {﹣1,0,1} R.
={x|x≥0},且A.∩ =B.,则集合B.可能是( ) A.{1,2}B.{x|x≤1} {-1,0,1} R.
{1} {﹣2,0,1} {﹣1,0,1} {﹣1,0,1,2}
={x∈R|x+1>0 },集合 ={x∈R|(x-1)(x+2)<0 },则A.∩B.= A.(-1,1)B.(-2,-1) (-∞,-2) (1,+∞),
{﹣1} {﹣1,2} {2} {﹣1,0,1,2}
[-1,2] [-2,1] {-2,0,1} {0,1}
{x|0<x≤1} {x|1<x<2} {x|0<x<1} {x|1≤x<2}
={x|x+1>0}, ={﹣2,﹣1,0,1},则(∁R.A.)∩B=( ) A.{﹣2,﹣1}B.{﹣2} {﹣2,0,1} {0,1}