(12) Consider the three infinite series given below: (-1)^-1 i) E 5n (n+1)(n²–1) ii) E 4n° – 2n +1 10(2)**2 32n+1 iii) n=1 n=1 n=0 a) Which one of these series diverges? Justify your answer. b) Identify the alternating series and verify that it converges. c) One of these series has a sum that may be computed; find the sum of this series.

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