A.x+y+
| B.(x+y)(
| C.(x+
| D.
|
2 | ||
|
xy |
2 | ||
|
2
|
|
2 |
1 |
x |
1 |
y |
y |
x |
x |
y |
|
y |
x |
x |
y |
1 |
x |
1 |
y |
1 |
x |
1 |
y |
1 |
x |
1 |
y |
3+x2 | ||
|
2+x2+1 | ||
|
2+x2 |
1 | ||
|
2+x2 |
1 | ||
|
A.|a+b|>a-b | B.|a+b|<|a|+|b| | C.2
| D.
|
ab |
A.
| B.
| C.
| D.
|
m |
3a+b |
3 |
a |
1 |
b |
A.4 | B.16 | C.9 | D.3 |
2 |
x |
8 |
y |
A.最大值64 | B.最小值
| C.最小值
| D.最小值64 |
A.
| B.
| C.
| D.
|
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