题目内容
2-
的倒数是______,
=______.
| 3 |
(
|
(1)根据倒数的概念可知,2-
的倒数是
=
=2+
;
(2)∵3>2,∴
>
,∴原式=|
-
|=
-
.
| 3 |
| 1 | ||
2-
|
2+
| ||||
(2-
|
| 3 |
(2)∵3>2,∴
| 3 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |
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题目内容
| 3 |
(
|
| 3 |
| 1 | ||
2-
|
2+
| ||||
(2-
|
| 3 |
| 3 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |