题目内容
化简下列各式:
(1)(
+
)÷
.
(2)(-1)2010-(
-
)0+(
)-1.
(1)(
| a+1 |
| a-1 |
| 1 |
| a2-2a+1 |
| a |
| a-1 |
(2)(-1)2010-(
| 3 |
| 2 |
| 1 |
| 2 |
(1)原式=[
+
]•
=
•
=
•
=
;
(2)原式=1-1+2=2.
| a+1 |
| a-1 |
| 1 |
| (a-1)2 |
| a-1 |
| a |
| a2-1+1 |
| (a-1)2 |
| a-1 |
| a |
| a2 |
| (a-1)2 |
| a-1 |
| a |
| a |
| a-1 |
(2)原式=1-1+2=2.
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