If the nth partial sum of a series an is n = 1 find an a1 and an n = 1 an Sn Σan n = 1 = = n - 3 n + 3 = (for n = 1)

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A: Solution :-

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A: Solving for the part B,

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A: Solution of the problem as follows

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A: As per the Bartleby guideline, 1 question can be answered. Please repost the second question.

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Q: For the series 1 + 9 + 81 + 729 + … a1 =  r =  The sum of the first 6 terms, S6, =

A: Given that  For the series 1 + 9 + 81 + 729 + …a1 = r = The sum of the first 6 terms, S6,