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8 October, 23:16

The term of an arithmetic sequence are shown below. Which recursive formula defines the sequence. F (1) = 6, f (4) = 12, f (7) = 18

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  1. 8 October, 23:35
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    f (n) = f (n - 1) + 2.

    Step-by-step explanation:

    The general form is f (n) = f (n-1) + d n > = 2.

    f (4) - f (1) = 12-6 = 6

    f (7) - f (4) = 18 - 12 = 6

    So the common difference d = 6 / 3 = 2.

    The answer is f (n) = f (n - 1) + 2.
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