lim(x^2-1)/(x^2-5x+4) x趋向于2 求极限

问题描述:

lim(x^2-1)/(x^2-5x+4) x趋向于2 求极限

=(2^2-1)/(2^2-5*2+4)
=(4-1)/(4+4-10)
=3/(-2)
=-3/2