# Arithmetic Series - - Reiny

Consider the series defined by Sn = 3n-1

Find the first four terms of the series.

How exactly do I do this?

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1. S1= 3*1 -1 = 2
S2 = 3*2 -1 = 5
S3 = 3*3 -1 = 8
etc.

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2. keep increasing N

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