题目内容
已知
+
=3,则
的值是______.
| 1 |
| a |
| 1 |
| b |
| a-ab+b |
| a+2ab+b |
∵
+
=3,
∴a+b=3ab,
∴
=
=
.
故答案为:
.
| 1 |
| a |
| 1 |
| b |
∴a+b=3ab,
∴
| a-ab+b |
| a+2ab+b |
| 2ab |
| 5ab |
| 2 |
| 5 |
故答案为:
| 2 |
| 5 |
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题目内容
| 1 |
| a |
| 1 |
| b |
| a-ab+b |
| a+2ab+b |
| 1 |
| a |
| 1 |
| b |
| a-ab+b |
| a+2ab+b |
| 2ab |
| 5ab |
| 2 |
| 5 |
| 2 |
| 5 |