x+1 |
x-3 |
x+1 |
x-3 |
|
1 |
2 |
3 |
2 |
A.{2,4,6} | B.{1,3,4} | C.{1,2,3,5,6} | D.{4} |
A.{a|3<a<4} | B.{a|3≤a<4} | C.{a|3<a≤4} | D.{a|3≤a≤4} |
1-x2 |
A.∅ | B.{1} | C.[0,+∞) | D.{(0,1)} |
A.A∩B={-2,-1} | B.(∁RA)∪B=(-∞,0) |
C.A∪B={0,+∞} | D.(∁RA)∩B={-2,-1} |
A.(-∞,-2] | B.(-∞,2]∪[4,+∞) | C.(-∞,-2) | D.(-∞,-2]∪[4,+∞) |
© 2017-2019 超级试练试题库,All Rights Reserved.