题目内容
先化简，再求值：
÷(x-
)，其中x=
+1．
| x-1 |
| x |
| 2x-1 |
| x |
| 3 |
原式=
÷
=
•
=
，
当x=
+1时，原式=
=
=
．
| x-1 |
| x |
| x2-2x+1 |
| x |
=
| x-1 |
| x |
| x |
| (x-1)2 |
=
| 1 |
| x-1 |
当x=
| 3 |
| 1 | ||
|
| 1 | ||
|
| ||
| 3 |
练习册系列答案
相关题目
题目内容
| x-1 |
| x |
| 2x-1 |
| x |
| 3 |
| x-1 |
| x |
| x2-2x+1 |
| x |
| x-1 |
| x |
| x |
| (x-1)2 |
| 1 |
| x-1 |
| 3 |
| 1 | ||
|
| 1 | ||
|
| ||
| 3 |