14. [/1 Points] DETAILS SCALCCC4 8.2.042. Consider the following series. T Z [.1' :7)" (a) Find the values ofX for which the series converges. (Enter the smaller number first.) (i i) r (b) Find the sum of the series for those values of X. Need Help? Submit Answer 15. [-/1 Points] DETAILS SCALCCC4 8.2.048. Assume the nth partial sum of a series Ms an is the following. I? = 1 5n = 4 n7'" (a) F'nd an (n > 1). m