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

Respuesta :

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)

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