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Re: Fast power compute

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  • Di Maria Giovanni
    Hi PETER You have solved my problem. Thank you VERY VERY VERY much. Regards Giovanni *********************** *********************** ***********************
    Message 1 of 4 , Nov 21, 2010
      Hi PETER
      You have solved my problem.
      Thank you VERY VERY VERY much.
      Regards
      Giovanni

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      --- In primenumbers@yahoogroups.com, Peter Kosinar <goober@...> wrote:
      >
      > Hi Giovanni,
      >
      > > In other words:
      > >
      > > I have 4 (or 5 or 200 or other quantity) group of 1011 (binary).
      > > How great is ITS value, without perform any string manipulation or repeated
      > > multiplication o addition.
      > > This is only an example. I would generalize this problem.
      >
      > If I understood your question correctly, you're looking for the sum
      > of a geometric progression [*]. If that is the case, it's quite simple:
      > sum = 11*(16^4 - 1)/(16 - 1) = 48059. The general expression is also
      > pretty simple. Or did I miss your actual question?
      >
      > Peter
      >
      > [*] http://en.wikipedia.org/wiki/Geometric_progression
      >
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