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9 November, 17:43

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

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  1. 9 November, 20:54
    0
    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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