A.{x|x>1} | B.{x|x>0} | C.{x|x<-1} | D.{x|x>1或x<-1} |
2x+1 |
3-x |
A.{x|-1<x<-
| B.{x|2<x<3} | ||||
C.{x|-
| D.{x|-1<x<-
|
A.{1} | B.{0,1} | C.{0,1,3} | D.空集 |
A.{x|0≤x≤2} | B.{x|1≤x≤2} | C.{x|0≤x≤4} | D.{x|1≤x≤4} |
A.{1} | B.{2,4} | C.{2,3,4} | D.{1,2,3,4} |
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