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7 June, 19:19

What is the explicite to 19,13,7,1, ...

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  1. 7 June, 21:00
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    19, 13, 7, 1, ...

    - 6 - 6 - 6

    Something that is explicit to the problem is tat it has a common difference of - 6.

    a (n) = a₁ + d (n - 1)

    a (n) = 19 - 6 (n - 1)

    a (n) = 19 - 6 (n) + 6 (1)

    a (n) = - 6n + 19 + 6

    a (n) = - 6n + 25
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