Find the common ratio of the give sequence, and write an exponential function which represents the sequence. Use n=1, 2, 3, ..

A)3;f(n)=81^n-1
B)3;f(n)=81(3)^n-1
C)1/3;f(n)=81(3)^n-1
D)1/3;f(n)=81(1/3)^n-1

Respuesta :

You have not given the sequence.

If it is 81, 243, 729, ... then B is the answer.

If it is 81, 27, 9, ... then D is the answer.
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