题目内容
化简求值：
÷(1-
)，其中x=2．
| 2x-2 |
| x2-1 |
| 1 |
| x+1 |
原式=
÷
=
•
=
，
当x=2，原式=
=1．
| 2(x-1) |
| (x+1)(x-1) |
| x |
| x+1 |
=
| 2(x-1) |
| (x+1)(x-1) |
| x+1 |
| x |
=
| 2 |
| x |
当x=2，原式=
| 2 |
| 2 |
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题目内容
| 2x-2 |
| x2-1 |
| 1 |
| x+1 |
| 2(x-1) |
| (x+1)(x-1) |
| x |
| x+1 |
| 2(x-1) |
| (x+1)(x-1) |
| x+1 |
| x |
| 2 |
| x |
| 2 |
| 2 |