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={x|x2-2x-3≥0}, ={x|-2≤x<2},则A.∩B.=( ) A.[-2,-1]B.[-1,2) [-1,1] [1,2)
(-∞, -1] [1, +∞) [-1,1] (-∞,-1] ∪[1,+∞)
(-∞, -1] [1, +∞) [-1,1] (-∞,-1] ∪[1,+∞)
={-1,1}, ={x|mx=1},且B.⊆A.,则m的值为( ) A.1或-1或0B.-1 1或-1 0
{(1,1)} {(﹣1,1)} {(1,﹣1)} {1,﹣1}
(0,1) (0,1] (﹣1,1) [﹣1,1]
={﹣2,﹣1,1}, ={x∈Z|﹣1≤x≤1},则A.∪B.=( ) A.{﹣1,1}B.{0,1} {﹣2,﹣1,1} {﹣2,﹣1,0,1}
(﹣∞,﹣1] [1,+∞) [﹣1,1] (﹣∞,﹣1]∪[1,+∞)
{﹣1,1} {(﹣1,1)} {(1,﹣1)} {(﹣1,﹣1)}
={﹣1,0,1}, ={x|1≤2x<4},则A.∩B等于( ) A.{1}B.{﹣1,1} {1,0} {﹣1,0,1}
{﹣1,0,1} {﹣1,1} [﹣1,1] (﹣1,1)
A∩B=(﹣1,1) A∪B=∅ A∪B=(﹣1,1) A∪B=U
(﹣1,1] (1,2) (﹣1,1) (0,2)
[﹣1,1) (0,1) [﹣1,1] (﹣1,1)
={x|x2<2-x},B ={x|一1<x<2},则AUB= A.(一1,1) (一2,2) (一1,2) (一2,1)