求水平渐近线和垂直渐近线
问题描述：
求水平渐近线和垂直渐近线
6x^2/x^2-4x,我想求他们的水平渐近线和垂直渐近线,请告诉我过程,怎么求得的.
答
f(x) = 6x^2/(x^2-4x)定义域：x不等于0,x不等于4.lim(x->无穷）f(x) = lim(x->无穷）6x^2/(x^2-4x) = lim(x->无穷）6/(1-4/x) = 6/1 = 6,水平渐近线：y = 6.lim(x->0)f(x) = lim(x->0)6x^2/(x^2-4x) = lim(x->+0)6x/...