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2 March, 06:09

Look at the sequence : 5, - 10, 20, - 40, 80

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  1. 2 March, 08:30
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    The general formula of the sequence is

    (-5/2) · (-2) ^n.

    The next few terms are: - 160, 320, - 640, 1280, - 2560, 5120, - 10240, 20480, - 40960, 81920, - 163840, 327680, - 655360, ...
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