题目内容
(1)计算(π+1)0-
+|-2
|;
(2)若a=1-
,简化简再求
+
的值.
| 12 |
| 3 |
(2)若a=1-
| 2 |
| a2-1 |
| a2+a |
| ||
| a2-a |
(1)原式=1-2
+2
=1;
(2)原式=
+
=
-
=
当a=1-
时,原式=
=
=
=
3+2
..
| 3 |
| 3 |
=1;
(2)原式=
| (a+1)(a-1) |
| a(a+1) |
| 1-a |
| a(a-1) |
=
| a-1 |
| a |
| 1 |
| a |
=
| a-2 |
| a |
当a=1-
| 2 |
1-
| ||
1-
|
-
| ||
1-
|
| ||
|
(
| ||||
(
|
| 2 |
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