题目内容
若
=
,则
=______.
| a+2b |
| b |
| 8 |
| 5 |
| a+b |
| a-b |
∵
=
,
∴b=-
a,
则
=
=-
.
故答案为:-
.
| a+2b |
| b |
| 8 |
| 5 |
∴b=-
| 5 |
| 2 |
则
| a+b |
| a-b |
-
| ||
|
| 3 |
| 7 |
故答案为:-
| 3 |
| 7 |
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题目内容
| a+2b |
| b |
| 8 |
| 5 |
| a+b |
| a-b |
| a+2b |
| b |
| 8 |
| 5 |
| 5 |
| 2 |
| a+b |
| a-b |
-
| ||
|
| 3 |
| 7 |
| 3 |
| 7 |