Suppose the n-th partial sum of the series S = _ 10 ak is n 2n - 10 Sn = ak 7n + 8 k=1 Then, the following hold (with n 2 2): a = 43/60 an = 86/(49*n^(2)+63*n+8) S = 2/7 Your last answer was interpreted as follows: 86 49 . n2 + 63 . n+ 8 The variables found in your answer were: [n]