I have this problem: and I am trying to do the root test, what is stopping me is that I don't know what to do with factorial when I take the soot of the summation.
No, I can use either the ratio or root test, I just assumed that the root test would be easier. Why is the ratio test easier?
Haha, that's quite funny because that's a practice problem my prof gave for the Ratio/Root test. I never learn't that these were for positive functions only. I did learn that you take the absolute value of the series, so wouldn't it work in that case because the series isn't actually negative?