lim→1 (X^2-3X+2)/(X^2+4X-5) 求极限

问题描述:

lim→1 (X^2-3X+2)/(X^2+4X-5) 求极限

lim(x→1) (X^2-3X+2)/(X^2+4X-5)
=lim(x→1) [(x-1)(x-2)]/[(x-1)(x+5)]
=lim(x→1) (x-2)/(x+5)=-1/6