题目内容
化简求值：(1-
)2÷
，其中x=2．
| 2 |
| x+1 |
| x-1 |
| x+1 |
原式=（
）2•
=
，
当x=2时，原式=
=
．
| x-1 |
| x+1 |
| x+1 |
| x-1 |
=
| x-1 |
| x+1 |
当x=2时，原式=
| 2-1 |
| 2+1 |
| 1 |
| 3 |
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题目内容
| 2 |
| x+1 |
| x-1 |
| x+1 |
| x-1 |
| x+1 |
| x+1 |
| x-1 |
| x-1 |
| x+1 |
| 2-1 |
| 2+1 |
| 1 |
| 3 |