题目内容
解方程
x-
|
x+
|
x-
|
解;(1)x-
=
,
x-
+
=
+
,
x=
;
(2)x+
=
,
x+
-
=
-
,
x=
;
(3)x-
=1,
x-
+
=1+
,
x=1
.
| 1 |
| 2 |
| 1 |
| 3 |
x-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
x=
| 5 |
| 6 |
(2)x+
| 3 |
| 5 |
| 3 |
| 4 |
x+
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
x=
| 3 |
| 20 |
(3)x-
| 2 |
| 7 |
x-
| 2 |
| 7 |
| 2 |
| 7 |
| 2 |
| 7 |
x=1
| 2 |
| 7 |
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