| x+9 |
| x+8 |
| x+10 |
| x+9 |
| x+6 |
| x+5 |
| x+7 |
| x+6 |
两边同时通分整理得:
| 1 |
| x2+17x+72 |
| 1 |
| x2+11x+30 |
∵两个分式分子相同,分式值相同,则分式分母相同,
∴x2+17x+72=x2+11x+30.
解得:x=-7.
经检验,x=-7是原方程的解.
(2)原方程可化为:
| 1 |
| x−1 |
| 1 |
| x |
| 1 |
| x−2 |
| 1 |
| x−1 |
| 1 |
| x−1992 |
| 1 |
| x−1991 |
| 1 |
| x |
整理得:
| 1 |
| x−1992 |
| 1 |
| x |
| 1 |
| x |
去分母整理得:x=1993.
经检验x=1993是原方程的解.
| x+7 |
| x+6 |
| x+9 |
| x+8 |
| x+10 |
| x+9 |
| x+6 |
| x+5 |
| 1 |
| x(x−1) |
| 1 |
| (x−1)(x−2) |
| 1 |
| (x−1991)(x−1992) |
| 1 |
| x |
| x+9 |
| x+8 |
| x+10 |
| x+9 |
| x+6 |
| x+5 |
| x+7 |
| x+6 |
| 1 |
| x2+17x+72 |
| 1 |
| x2+11x+30 |
| 1 |
| x−1 |
| 1 |
| x |
| 1 |
| x−2 |
| 1 |
| x−1 |
| 1 |
| x−1992 |
| 1 |
| x−1991 |
| 1 |
| x |
| 1 |
| x−1992 |
| 1 |
| x |
| 1 |
| x |