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={x|x2﹣4x﹣5<0}, ={x|2<x<4},则A.∩B=( ) A.(1,3)B.(1,4) (2,3) (2,4)
={x|x2﹣2x﹣3=0}, ={x|﹣2<x<3},则A.∩B.=( ) A.{﹣1,3}B.{﹣1} {3} ∅
{1,3} {-3,-1,1,3} {2-,1,3} {-2-,1,3}
(﹣5,1] [1,3) [﹣7,3) (﹣5,3)
(0,3] [﹣4,3] [﹣4,0) [﹣4,0]
(﹣1,2) (0,1) (﹣1,0) (﹣1,3)
={x|﹣1<x<2}, ={x|0<x<3},则A.∪B.=( ) A.(﹣1,3)B.(﹣1,0) (0,2) (2,3)
={x|2={x|(x-1)(x-3)<0},则A.∩B.=( ) A.(1,3)B.(1,4) (2,3) (2,4)
{-1,1,3} {1,3} {-3,1} {-3,-1,1}
={x|-1= ( ) A.(-1,3) B.(-1,0) (0,2) (2,3)
{0,3} (0,3) (﹣1,3) {﹣1,3}
[﹣1,+∞) (﹣1,+∞) (1,3] (1,3)
(1,13-ln 3) (1,6) (1,+∞) (1,2)
[1,3] (1,3] {2,3} {1,2,3}
={x|x2-3x<0}, ={1,a},且A.∩B.有4个子集,则实数a的取值范围是( ) A.(0,3)B.(0,1)∪(1,3) (0,1) (-∞,1)∪(3,+∞)