题目内容
(1)计算:(-2)3+
(2011-
)0-sin30°
(2)化简:
-
| 1 |
| 2 |
| 5 |
(2)化简:
| m2+2m+1 |
| m2-1 |
| 2 |
| m-1 |
(1)原式=-8+
-
(3分)=-8(4分)
(2)原式=
-
=
-
(2分)
=
=
=1(4分)
| 1 |
| 2 |
| 1 |
| 2 |
(2)原式=
| (m+1)2 |
| (m+1)(m-1) |
| 2 |
| m-1 |
| m+1 |
| m-1 |
| 2 |
| m-1 |
=
| m+1-2 |
| m-1 |
| m-1 |
| m-1 |
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