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31 May, 11:00

Find the first, fourth, and eighth terms of the sequence. a (n) = -2 x 2^n-1

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  1. 31 May, 11:15
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    2, 16 and 256.

    Step-by-step explanation:

    Just substitute for n:-

    first term (when n = 1) = 2 * 2^ (1-1)

    = 2 * 1 = 2

    4th term = 2 * 2^ (4-1) = 16

    8th term = 2 * 2^ (8-1) = 256
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