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29 October, 11:34

Compute the sum of the first 8 terms in the sequence: 100, - 50, 25, - 12,5. Show work!

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  1. 29 October, 12:04
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    100, - 50, 25, - 12.5, 6.25, - 3.125, 1.5625, - 0.78125

    Step-by-step explanation:

    Each term is being multiplied by - 0.5

    How did I know?

    Divide the second term by the first.

    -50 divided by 100 = - 1/2

    Find the last four terms.

    -12.5 x - 1/2 = 6.25

    6.25 x - 1/2 = - 3.125

    -3.125 x - 1/2 = 1.5625

    1.5625 x - 1/2 = - 0.78125
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