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Math Help - sigma notation

  1. #1
    tmm
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    sigma notation

    what would be the sigma notation for 5+1+1/5+1/25+1/125. Thanks if anyone could help me out quick that would be great!
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  2. #2
    MHF Contributor Mathstud28's Avatar
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    Quote Originally Posted by tmm View Post
    what would be the sigma notation for 5+1+1/5+1/25+1/125. Thanks if anyone could help me out quick that would be great!
    \sum_{n=-1}^{5}\bigg(\frac{1}{5}\bigg)^n=\bigg(\frac{1}{5}\  bigg)^{-1}+\bigg(\frac{1}{5}\bigg)^0+\bigg(\frac{1}{5}\big  g)^1+\bigg(\frac{1}{5}\bigg)^2+\bigg(\frac{1}{5}\b  igg)^3=5+1+\frac{1}{5}+\frac{1}{25}+\frac{1}{125}
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