你可能感兴趣的试题
={x|ax=1}, ={0,1},若A.⊆B.,则由a的取值构成的集合为( ) A.{1}B.{0} {0,1} ∅
={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
={-1,0,1},B={x|-1≤x<1},则A.∩ =( ) A.{0} B.{-1,0} {0,1} {-1,0,1}
={x|0<x<2}, ={x||x|≤1},则集合A.∩B.=( ) A.(0,1)B.(0,1] (1,2) [1,2)
(0,1),(1,2) (0,1),(1,2) y=1或y=2 y y≥1
(0,1) (0,1] (﹣1,1) [﹣1,1]
={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}
={x|x<1}, ={x|x>0},则A.∩B.等于( ) A.(﹣∞,0)B.(0,1) (﹣∞,1) (0,+∞)
={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}
(﹣1,2) (0,1) (﹣1,0) (﹣1,3)
={x|ax=1}, ={0,1},若A.⊆B.,则由a的取值构成的集合为( ) A.{1}B.{0} {0,1}
={x|2x≤4}, ={x|log2x>0},则A.∩B=( ) A.[1,2]B.(1,2] (0,1) (0,1]
={y|y=x2}, ={x|y=lg(1﹣x)},则A.∩B.= A.[0,1]B.[0,1) (﹣∞,1) (﹣∞,1]
={-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|y=lg(x-x2)}, ={x|x2-cx<0,c>0},若A.⊆B.,则实数c的取值范围是( ) A.(0,1]B.[1,+∞) (0,1) (1,+∞)
={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,+∞)