题目内容
解下列方程(组):
(1)
+
=
+
(2)1+
=|
|
(1)
| 13-2x |
| 11-2x |
| 17-2x |
| 15-2x |
| 19-2x |
| 17-2x |
| 11-2x |
| 9-2x |
(2)1+
| 1 | ||||
1+
|
| 3x+2 |
| 2x+1 |
原方程可化为(1+
)+(1+
)=(1+
)+(1+
)
即
-
=
-
=
(11-2x)(9-2x)=(17-2x)(15-2x)
得:x=
(2)原方程化为
=|
|,于是得
则
故原方程得解为:x≤-
且x≠-1 或x>-
且x≠0
| 2 |
| 11-2x |
| 2 |
| 15-2x |
| 2 |
| 17-2x |
| 2 |
| 9-2x |
即
| 1 |
| 11-2x |
| 1 |
| 9-2x |
| 1 |
| 17-2x |
| 1 |
| 15-2x |
| -2 |
| (11-2x)(9-2x) |
| -2 |
| (17-2x)(15-2x) |
得:x=
| 13 |
| 2 |
(2)原方程化为
| 3x+2 |
| 2x+1 |
| 3x+2 |
| 2x+1 |
|
|
故原方程得解为:x≤-
| 2 |
| 3 |
| 1 |
| 2 |
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