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14 November, 07:26

What is the fifteenth term of the sequence 5, - 10, 20, - 40, 80

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  1. 14 November, 07:40
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    5, - 10, 20, - 40, 80,

    the pattern is (n*-2)

    -160, 320, - 640, 1280, - 2560, 5120, - 10240, 20480, - 40960, 81920.

    81,920 is your answer.
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