lim sin(x-2)/x^2-5x+6=?

问题描述:

lim sin(x-2)/x^2-5x+6=?
要等价无穷小过程

lim(x→2) sin(x-2)/x^2-5x+6
=lim(x→2) (x-2)/(x-2)(x-3) * lim(x→2) sin(x-2)/(x-2).这一步是等价无穷小
=lim(x→2) 1/(x-3) * 1
=-1