3 Σ n(n + 1) n= 1 The first partial sum is S, = (Type an integer or decimal rounded to four decimal places as needed.)

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A: Note: As per bartleby instruction when more then one question is given only one has to be answered.…

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Q: (i) (ii) n=1 In M8 n=1 n 2n + 1 2 n(n + 2)

A: Given problem:- ∑n=1∞lnn2n+1 ∑n=1∞2nn+2