题目内容
若
+
有意义,则
=______.
x-
|
|
| 3 | x |
∵
+
有意义,
∴x-
≥0,
-x≥0,
∴x-
=0,∴x=
,
∴
=
=
,
故答案为
.
x-
|
|
∴x-
| 1 |
| 8 |
| 1 |
| 8 |
∴x-
| 1 |
| 8 |
| 1 |
| 8 |
∴
| 3 | x |
| 3 |
| ||
| 1 |
| 2 |
故答案为
| 1 |
| 2 |
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题目内容
x-
|
|
| 3 | x |
x-
|
|
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 | x |
| 3 |
| ||
| 1 |
| 2 |
| 1 |
| 2 |