Hey guys I have this homework problem that I am having difficulty explaining. The question is why the integral comparison test cannot be used. The Series is:
The sum of the indefinite series from n=1 to infinity is equal to cos^2(n)/(1+n^2).
I see that the series is positive and is continuously decreasing, but I can't seem to find the integral of the series and explain why you can't use the integral comparison test.
Thanks for all the help!