2x-3 |
x |
A.(0,3] | B.(-∝,0]∪(3,+∝) | C.[3,+∝) | D.(-∝,0)∪[3,+∝) |
2x-3 |
x |
x-3 |
x |
|
|
A.a≥2 | B.a≥1 | C.a≤1 | D.a≤2 |
A.{x|x<-1或x>2} | B.{x|x<-1或x≥2} | C.{x|x≤-1或x>2} | D.{x|x≤-1或x≥2} |
A.{1,2,3,4,5} | B.{2,3,4,5} | C.{3,4,5} | D.{x|1<x≤5} |
A.{x|-5<x<5} | B.{x|-3<x<5} | C.{x|-5<x≤-3} | D.{x|-5<x<-3} |
1 |
x-1 |
A.∅ | B.{x|x≥1} | C.{x|x>1} | D.{x|x≥1或x<0} |
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