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25 February, 22:39

Write a explicit formula for the sequence 10, 9.5, 9, 8.5, 8 then find ^a8

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  1. 25 February, 23:45
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    The common difference is - 0.5, so:

    a (n) = 10 - 0.5n; where n is all positive whole numbers including 0.

    a (8) = 10 - 0.5 (8)

    a (8) = 10 - 4

    a (8) = 6
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