Well, I know from the comparison test, if An=1/(2n)! and Bn=1/2n and if An is less than Bn, and if Bn is convergent, than An is also convergent. Yet, in this case, Bn is divergent (because 1/2n is a p-series with p=1, and this is divergent.) So, the comparison test shows nothing...
So, I am...
I am unsure as to how factorials should be expanded.
I have \sum\stackrel{1}{(2n!)} (if what was just typed did not make sense due to html error on my part, it is supposed to say the sum of 1/(2n)!) from n=1 to infinity. I did the ratio test and found the limit to be 0, which is less than...