x2-2x+2 |
2x-2 |
A.
| B.
| C.0 | D.1 |
x2-2x+2 |
2x-2 |
x2-2x+1+1 |
2(x-1) |
(x-1)2+1 |
2(x-1) |
x-1 |
2 |
1 |
2(x-1) |
x-1 |
2 |
1 |
2(x-1) |
x-1 |
2 |
1 |
-2(x-1) |
-
|
x-1 |
2 |
1 |
-2(x-1) |
4 |
x |
A.6 | B.7 | C.8 | D.9 |
A.3
| B.1+2
| C.6 | D.7 |
|z1|+|z2| |
2 |
z |
A.
| B.
| C.
| D.
|
A.0 | B.1 | C.2 | D.
|
A.x+y≥2
| B.xy≤
| C.x+y≤(
| D.xy≥2
|
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