If the n-th partial sum of a series (n=1 to infinity) an is sn =(3n + 5)/(2n − 1) find the following.  a) Is the series an convergent or divergent? If it is convergent, find the sum. If it is divergent, explain  b) Is the sequence {an} convergent or divergent? If it is convergent, find the limit. If it is divergent, explain why. Do it without calculating any expression for an. c) Is the series sn convergent or divergent? If it is convergent, find the sum. If it is divergent, explain why

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