x-1 |
x-2 |
A.{x|1≤x<2} | B.{x|1≤x≤2} | C.{x|0≤x≤2} | D.{x|x≤0或x≥2} |
x-1 |
x-2 |
A.{(-1,-1),(1,1)} | B.R | C.{y∈R|-
| D.∅ |
x |
A.(P∩T)∪S=S | B.P=T=S | C.T=U | D.P∪(∁US)=T |
A.{x|-1≤x≤1} | B.{x|-1≤x<1} | C.ϕ | D.{x|x=1} |
A.{1,5} | B.{3,5,9} | C.{5,7,9} | D.{5,9} |
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