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24 March, 15:35

Which formula can be used to find the nth term of a geometric sequence where the fifth term isn1/16 and the common ratio is 1/4?

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  1. 24 March, 19:25
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    1/16=a (1/4) ^ (5-1)

    1/16=a (1/4) ^4

    1/16=a/256

    256/16=a

    16=a

    So the initial term is 16 so our formula is:

    a (n) = 16 (1/4) ^ (n-1)
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