a |
2 |
3 |
b |
1 |
3 |
1 |
3 |
2 |
3 |
2 |
3 |
1 |
3 |
7 |
9 |
a |
b |
2 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
9 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
4 |
1 |
3 |
3 |
4 |
a |
1 |
2 |
b |
a |
b |
a |
b |
A.4 | B.8 | C.0 | D.2 |
a |
b |
c |
a |
b |
c |
0 |
A.有两个不同的解 | B.只有一解 |
C.至多有一个解 | D.无解 |
a |
b |
a |
b |
a |
b |
A.
| B.-
| C.
| D.
|
AB |
a |
b |
a |
b |
a |
b |
a |
b |
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