题目内容
计算:
-
| 1 |
| x-1 |
| 2 |
| x2-1 |
原式=
-
=
=
.
| x+1 |
| (x+1)(x-1) |
| 2 |
| (x+1)(x-1) |
=
| x-1 |
| (x+1)(x-1) |
=
| 1 |
| (x+1) |
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题目内容
| 1 |
| x-1 |
| 2 |
| x2-1 |
| x+1 |
| (x+1)(x-1) |
| 2 |
| (x+1)(x-1) |
| x-1 |
| (x+1)(x-1) |
| 1 |
| (x+1) |