The nth Term Test for Divergence Practice Test

The series converges because $\frac{n^2+4}{n^2}$ is decreasing.

The series converges because $\lim_{n\to\infty}\frac{n^2+4}{n^2}=1$.

No conclusion can be drawn because the limit is $1$.

The series diverges because $\lim_{n\to\infty}\frac{n^2+4}{n^2}\neq 0$.

The series diverges because the terms are greater than $1$.