lim(sinx/x+xsin(1/x)) =
问题描述:
lim(sinx/x+xsin(1/x)) =
x->无穷
答
lim(sinx/x+xsin(1/x))
=lim(sinx/x+sin(1/x)/(1/x))
sin(1/x)和1/x是等价无穷小量
|sinx|