x+1 |
x-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} |
x+1 |
x-2 |
1 |
2 |
5 |
2 |
A.{x|-4≤x≤-2} | B.{x|-1≤x≤3} | C.{x|3≤x≤4} | D.{x|3<x≤4} |
1 |
2 |
A.20 | B.25 | C.30 | D.42 |
A.{x|-2<x<1} | B.{x|-3<x<-1} | C.{x|-1<x<2} | D.{x|1<x<-4} |
A.A∩B={-2,-1} | B.(CUA)∪B=(-∞,0) |
C.A∪B=(0,+∞) | D.(CUA)∩B={-2,-1} |
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