A.
| B.ab有最小值
| ||||||||||
C.
| D.a2+b2有最小值
|
1 |
a |
1 |
b |
a+b |
a |
a+b |
b |
b |
a |
a |
b |
1 |
a |
1 |
b |
ab |
1 |
4 |
1 |
4 |
a |
b |
ab |
ab |
a |
b |
2 |
a |
b |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
bc |
a |
ac |
b |
ab |
c |
1 |
x2 |
1 |
y2 |
16x2sin2x+4 |
xsinx |
1 |
a |
3 |
b |
A.7 | B.4 | C.4+2
| D.4+2
|
1 |
4 |
b |
a |
a |
b |
A.1个 | B.2个 | C.3个 | D.4个 |
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