Convergent and divergent series?
Use the ratio test to determine whether each series is convergent or divergent.
Well my issue on this problem is finding the (An) as my book calls it so that I can actually do the ration test.
for number one I know it 4/(n something but I am confused what function would express the series) I though it was (n)^3 but that wont work.
for number 2 I know it is n/n^2 but I am not sure how to represent the numerator.