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4 August, 11:46

A geometric sequence is defined by the explicit formula an = 5 (-3) n-1. What is the recursive formula for the nth term of this sequence?

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  1. 4 August, 12:59
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    An=a1 (r) ^ (n-1)

    an=5 (-3) ^ (n-1)

    so then each term is multiplied by - 3

    so

    f (n) = - 3 (f (n-1))

    and

    f (n) = 5
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