Suppose sigma dn u and sn is the nth partial sum a determin

Suppose sigma d_n = u and s_n is the nth partial sum a) determine lim_n rightarrow infinity a_n b) determine lim_n rightarrow infinity Please show using Tyl

Solution

given a_n =4

=>series converges and sum of series is 4

a)lim_n-> a_n =0

b)lim_n-> s_n =a_n =4