题目内容
若a,b为有理实数且
-
+
=a+b
,则a+b=______.
| 4 |
| 18 |
|
| 2 |
∵
-
+
=2-3+
=-1+
=a+b
,
∴a=-1,b=
,
∴a+b=-
.
故答案为:-
.
| 4 |
| 18 |
|
| ||
| 2 |
| ||
| 2 |
| 2 |
∴a=-1,b=
| 1 |
| 2 |
∴a+b=-
| 1 |
| 2 |
故答案为:-
| 1 |
| 2 |
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