limx→1(x^2-2x+1/(x^2-1)的值

问题描述:

limx→1(x^2-2x+1/(x^2-1)的值

limx→1(x^2-2x+1/(x^2-1)=limx→1[(x-1)^2/(x+1)(x-1)]=limx→1](x-1)/(x+1)]=0