Let's take the limit n→∞lim(n3) Let's divide numerator and denominator by n: n→∞lim(n3) = n→∞lim(13n1) Do Replacement u=n1 then n→∞lim(13n1)=u→0+lim(3u) = 0⋅3=0
The final answer: n→∞lim(n3)=0
Lopital's rule
There is no sense to apply Lopital's rule to this function since there is no indeterminateness of 0/0 or oo/oo type