lim(n→∞)(3n^3-2n+1)/n^3+n^2

问题描述:

lim(n→∞)(3n^3-2n+1)/n^3+n^2

上下同除以n³
原式= lim(n→∞)(3-2/n²+1/n³)/(1+1/n)
=3/1
=3