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 |