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11 September, 21:40

Find an explicit formula for the arithmetic sequence

-45, - 30, - 15, 0, ...

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  1. 12 September, 00:42
    0
    an = - 45 + 15 (n - 1)

    Step-by-step explanation:

    The explicit formula for an arithmetic sequence is ...

    an = a1 + d (n - 1)

    where an is the n-th term; a1 is the first term (-45), and d is the common difference (15). Filling in the values for the given sequence, we find the formula to be ...

    an = - 45 + 15 (n - 1)
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