x2-2x+1 |
x-2 |
1 |
m |
2 |
n |
x2-2x+1 |
x-2 |
(x-2)2+2(x-2)+1 |
x-2 |
1 |
2-x |
(2-x)×
|
1 |
2-x |
x2-2x+1 |
x-2 |
1 |
m |
2 |
n |
2m+n |
m |
4m+2n |
n |
n |
m |
4m |
n |
|
1 |
4 |
1 |
2 |
1 |
m |
2 |
n |
A.12 | B.14 | C.16 | D.18 |
A.有最大值2 | B.等于4 | C.有最小值3 | D.有最大值4 |
A.A≥B | B.A<B | C.A=B | D.A>B |
a |
b |
a |
b |
1 |
x |
2 |
y |
A.6 | B.2
| C.2 | D.9 |
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