题目内容
(1)计算:(
)-1-
×2cos45°-(2010+π)0+|-3+
|;
(2)化简
÷(a-
).
| 1 |
| 2 |
| 8 |
| 3 |
(2)化简
| a2-1 |
| a |
| 2a-1 |
| a |
(1)原式=2-2
×2×
-1+3-
=-
;
(2)原式=
÷
=
•
=
.
| 2 |
| ||
| 2 |
| 3 |
| 3 |
(2)原式=
| (a+1)(a-1) |
| a |
| a2-2a+1 |
| a |
| (a+1)(a-1) |
| a |
| a |
| (a-1)2 |
| a+1 |
| a-1 |
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