Which series is guaranteed to diverge by the Divergence Test?
∑1n3\sum \frac{1}{n^3}∑n31
∑nn+1\sum \frac{n}{n+1}∑n+1n
∑12n\sum \frac{1}{2^n}∑2n1
∑1n!\sum \frac{1}{n!}∑n!1