题目内容
(1)计算:(
-1)0+(
-1)
(2)计算:
-
.
| 2 |
| 3 |
(2)计算:
| a |
| a-1 |
| a+1 |
| a2-1 |
(1)原式=1+
-1
=
;
(2)原式=
-
=
=1.
| 3 |
=
| 3 |
(2)原式=
| a(a+1) |
| (a+1)(a-1) |
| a+1 |
| (a+1)(a-1) |
=
| (a+1)(a-1) |
| (a+1)(a-1) |
=1.
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