I mainly ask this because I was thinking about doing Direct Comparison Test for Convergence testing on Series.
I am looking at
$$\sum_{n=2}^{\infty} \frac{(\arctan n)(\ln n)}{n^2}$$
which I am going to compare with
$$\sum_{n=2}^{\infty} \frac{\frac{\pi}{2}(\ln n)}{n^2}$$
can I say that
$$\sum_{n=2}^{\infty} \frac{\frac{\pi}{2}(\ln n)}{n^2} < \sum_{n=2}^{\infty} \frac{n^{0.5}}{n^2} =\sum_{n=2}^{\infty} \frac{1}{n^{1.5}}$$
The final series converges by P series and because that's greater than the original series, the original series also converges.
Did I make any incorrect assumptions?