题干
（1）化简：
+
+1；（2）解方程：
=
．
| 1 |
| a |
| + |
| 1 |
| 1 |
| a |
| - |
| 1 |
| a |
| a |
| + |
| 1 |
| 3 |
| x |
| - |
| 3 |
| 4 |
| x |
答案(点此获取答案解析）
解：（1）原式=
| 1 |
| a |
| + |
| 1 |
| 1 |
| a |
| - |
| 1 |
| a |
| a |
| + |
| 1 |
| 3 |
| x |
| - |
| 3 |
| 4 |
| x |
解：（1）原式=
