题目内容
化简：
+
=______．
| 1 |
| x |
| 1 |
| x(x-1) |
原式=
+
=
=
．
故答案为：
．
| x-1 |
| x(x-1) |
| 1 |
| x(x-1) |
| x-1+1 |
| x(x-1) |
| 1 |
| x-1 |
故答案为：
| 1 |
| x-1 |
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题目内容
| 1 |
| x |
| 1 |
| x(x-1) |
| x-1 |
| x(x-1) |
| 1 |
| x(x-1) |
| x-1+1 |
| x(x-1) |
| 1 |
| x-1 |
| 1 |
| x-1 |