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24 June, 06:35

Write the recursive rule and an explicit rule for the geometric sequence 9,27,81,243

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  1. 24 June, 07:02
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    Recursive

    a (1) = 9; a (n+1) = 3 * a (n)

    Explicit

    a (n) = 9 * 3^ (n-1)
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