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17 September, 04:37

64,-48,36,-17 ... which formula can be used to describe the sequence?

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  1. 17 September, 05:48
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    Explicit formula is an = 64 (-3/4) ^ (n-1).

    Step-by-step explanation:

    Looks like a geometric sequence with a negative common ratio.

    -48/64 = - 3/4

    36 / - 48 = - 3/4

    Now - 27/36 = - 3/4 so I think there's a typo in the question. Its - 27 not - 17.

    The required formula is 64 (-3/4) ^ (n-1).
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