题目内容
分式方程2-| 1 | ||||||||||
4-
|
分析:移项,倒数,再移项,通分,倒数,依次化简.
解答:解:原方程化为
=2-x,
∴4-
=
,即
=
,
6-
=
,即
=
,
∴2-
=
,即
=
,
∴4-
=
,即
=
,
∴6-
=
,即
=6-1+
,
整理,得
-
=0,
解得x1=1,x2=
.
经检验:x1=1,x2=
是原方程的根.
故答案为:x1=1,x2=
.
| 1 | ||||||||||
4-
|
∴4-
| 3 | ||||||||
6-
|
| 1 |
| 2-x |
| 3 | ||||||||
6-
|
| 7-4x |
| 2-x |
6-
| 5 | ||||||
2-
|
| 6-3x |
| 7-4x |
| 5 | ||||||
2-
|
| 36-21x |
| 7-4x |
∴2-
| 1 | ||||
4-
|
| 35-20x |
| 36-21x |
| 1 | ||||
4-
|
| 37-22x |
| 36-21x |
∴4-
| 3 | ||
6-
|
| 36-21x |
| 37-22x |
| 3 | ||
6-
|
| 112-67x |
| 37-22x |
∴6-
| 5 |
| x |
| 111-66x |
| 112-67x |
| 5 |
| x |
| 1-x |
| 112-67x |
整理,得
| 5(1-x) |
| x |
| 1-x |
| 112-67x |
解得x1=1,x2=
| 5 |
| 3 |
经检验:x1=1,x2=
| 5 |
| 3 |
故答案为:x1=1,x2=
| 5 |
| 3 |
点评:本题考查了解分式方程.关键是重复使用倒数关系,通分,找公因式的方法求解.
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