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Math Help - Series problems

  1. #1
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    Aug 2010
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    Question Series problems

    Sorry about the caps lock and exclamation points, but I have a time limit and these two questions are really stumping me!

    1.) evaluate

    i kept getting 1283.5, but i know that can't be right...

    also!

    2.)The sum of a geometric series is -1023 and its first term is -3. If the last term is -768, what is the common ratio?

    please supply you work if you have the time! i would like to understand this, as well as get a good grade! ..
    Last edited by CaptainBlack; September 26th 2010 at 02:25 PM. Reason: restore deleted post
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