化简成1/(x-1)-1/x+1/(x-2)-1/(x-1)+…+1/(x-10)-1/(x-9)=5/12
1/(x-10)-1/x=5/12
10/(x(x-10))=5/12
x=12
那下面全化成上面形式 最后x=?咦题目不对啊
1/(x(x-1))=1/(x-1) -1/x,拆项相销可得方程为1/(x-10)-1/x=10/(x(x-10))=5/12.解得x=12或-2
同样的都裂开,得1/(x-10)-1/x=5/12,解得x=12。
左式=1/x-1/(x-1)+1/(x-1)-1/(x-2)+……+1/(x-9)-1/(x-10)=1/x-1/(x-10),这样就变成了一元二次方程。