题目内容
通分;
(1)
,
;
(2)
,
.
(1)
| 4a |
| 5b2c |
| 5b |
| -2ac2 |
(2)
| x-1 |
| x2-2x+1 |
| 1 |
| 1-x |
(1)
=
,
=-
;
(2)
=
=
;
=-
.
| 4a |
| 5b2c |
| 8a2c |
| 10ab2c2 |
| 5b |
| -2ac2 |
| 25b3 |
| 10ab2c2 |
(2)
| x-1 |
| x2-2x+1 |
| x-1 |
| (x-1)2 |
| 1 |
| x-1 |
| 1 |
| 1-x |
| 1 |
| x-1 |
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