lim(sin2x)/(x^3+3x) x趋向于0
问题描述:
lim(sin2x)/(x^3+3x) x趋向于0
快
答
x趋于0
则sin2x~2x
原式=lim2x/x*1/(x²+3)
=2*1/(0+3)
=2/3