A.{x|x<2} | B.{x|-2≤x<1} | C.{x|-2≤x≤2} | D.{x|1<x≤2} |
-x2+2x |
A.[-2012,2013] | B.(-2012,2013) | C.[-2013,2011] | D.(-2013,2011) |
x2 |
4 |
3y2 |
4 |
A.[-2,2] | B.[0,2] | C.[0,+∞) | D.{(-1,1),(1,1)} |
2 |
x-1 |
A.{x|1<x≤2} | B.{x|-2≤x≤1} | C.{x|-2≤x<1} | D.{x|x<2} |
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