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8 October, 17:05

Write the expression for the nth term for m9, - 27, 81

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  1. 8 October, 17:12
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    I don't think that that "m" belongs in this sequence. Focus on 9, - 27, 81, ...

    Multiplying 9 by what number produces the product - 27?

    Mult. - 27 by what number produces 81?

    This number is called the "common ratio" of this "geometric sequence."

    Finish this recursive formula:

    a_ (n+1) = (a_n) * ()
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