题目内容
已知：
+
=
，则
+
=______．
| 1 |
| a |
| 1 |
| b |
| 5 |
| a+b |
| b |
| a |
| a |
| b |
由已知得
+
=5
1+
+
+1=5
∴
+
=3．
| a+b |
| a |
| a+b |
| b |
1+
| b |
| a |
| a |
| b |
∴
| b |
| a |
| a |
| b |
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题目内容
| 1 |
| a |
| 1 |
| b |
| 5 |
| a+b |
| b |
| a |
| a |
| b |
| a+b |
| a |
| a+b |
| b |
| b |
| a |
| a |
| b |
| b |
| a |
| a |
| b |