lim(x->∞) (sin2x)/(x^2)=

问题描述:

lim(x->∞) (sin2x)/(x^2)=
lim (sin2x)/(x^2)=_______
(x->∞)

lim(sin2x)/(x^2)=lim[(sin2x)*1/(x^2)]
当x->∞,sin2x是有界函数,1/(x^2)是无穷小
有界函数与无穷小的乘积是无穷小
所以结果是无穷小,即为0