- #1
The-Mad-Lisper
- 12
- 1
Homework Statement
[tex]\lim_{n \to \infty}\frac{(-1)^{n+1} \cdot n^2}{n^2+1}[/tex]
Homework Equations
[tex]\lim_{n \to \infty}a_n \neq 0 \rightarrow S \ is \ divergent[/tex]
The Attempt at a Solution
I tried L'Hopital's rule, but I could not figure out how to find the limit of that pesky [itex](-1)^{n+1}[/itex].
Edit: This is not actually a geometric series, disregard that part of the title.