x-a |
x-1 |
A.(-∞,1) | B.(0,1) | C.(1,+∞) | D.[1,+∞) |
x-a |
x-1 |
(x-1)-(x-a) |
(x-1)2 |
A.a≥
| B.a≥
| C.a<
| D.a<
|
A.{(x,y,z)|(x-1)2+y2+z2≤1} | B.{(x,y,z)|(x-1)2+y2+z2=1} |
C.{(x,y,z)|(x-1)+y+z≤1} | D.{(x,y,z)|x2+y2+z≤1} |
A.{1} | B.{2010} | C.M | D.P |
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