(x-2)分之3-(x-1)分之4=(x-4)分之1-(x-3)分之2怎么解
问题描述:
(x-2)分之3-(x-1)分之4=(x-4)分之1-(x-3)分之2怎么解
最后第二步怎么得出来的?
答
3/(x-2)+2/(x-3)=4/(x-1)+1/(x-4),移项通分得(5x-13)/(x^2-5x+6)=(5x-17)/(x^2-5x+4),交换内项得(5x-13)/(5x-17)=(x^2-5x+6) /(x^2-5x+4),{写不下过程} 化简为 1+4/(5x-17)=1+2/(x^2-5x+4),可得x=5或x=5/2...