(x-2)/(1-x)^2,(2x-3)/(1-3)^3,5/(x-1) 的最简公分母?
问题描述：
(x-2)/(1-x)^2,(2x-3)/(1-3)^3,5/(x-1) 的最简公分母?
答
(x-2)/(1-x)^2=(x-2)/(x-1)^2
(2x-3)/(1-3)^3=-(2x-3)/8
5/(x-1)=5/(x-1)
最简公分母8(x-1)^2
答
x-1=-(1-x)
所以最简公分母是(1-x)^3