\textbf{113.} The sequence $\left\{\dfrac{n^2 + (-1)^n}{2n^2 + 2}\right\}$ is of what type? \medskip (1) Divergent -- divergent \hfill (2) Non-increasing -- convergent \hfill (3) Decreasing -- convergent \hfill (4) Increasing -- divergent \medskip