Determine whether the sequence below is a geometric sequence and, if so, find a formula that describes the sequence. 1, 3, 9, 27, 81, …

asked Sep 7, 2018 9.8k views

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5 votes

this is geometric with a common ratio of 3 (3/1 = 3 and 9/3 = 3 etc)
the formula for the nth term is
an = 3^(n-1)

Chris Rudd answered Sep 13, 2018

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