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