题目内容
若x=
(
+
),y=
(
-
),则x+y的值为______.
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
x+y=
(
+
)+
(
-
)=
(
+
+
-
)=
×2
=
.
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| a |
| b |
| 1 |
| 2 |
| a |
| a |
练习册系列答案
相关题目
题目内容
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| 1 |
| 2 |
| a |
| b |
| a |
| b |
| 1 |
| 2 |
| a |
| a |