题目内容
化简:(1)
-
-(
)0;
(2)
•
-1.
| 6 | ||
|
| 18 |
| 1 |
| 2 |
(2)
| a+1 |
| a-1 |
| a2-1 |
| a+1 |
(1)原式=3
-3
-1=-1;
(2)原式=
•
-1
=a+1-1
=a.
| 2 |
| 2 |
(2)原式=
| a+1 |
| a-1 |
| (a+1)(a-1) |
| a+1 |
=a+1-1
=a.
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题目内容
| 6 | ||
|
| 18 |
| 1 |
| 2 |
| a+1 |
| a-1 |
| a2-1 |
| a+1 |
| 2 |
| 2 |
| a+1 |
| a-1 |
| (a+1)(a-1) |
| a+1 |