I have this series (1-v^39) + (1-v^36) +(1-v^33).....+(1-v^3) I added up all the 1's and was left with: 13-(v^3 +v^6....+v^39) Factored out v^3 13- v^3(1+v^3 +..... v^36) So I get 13 - v^3 * [(1-v^37)/(1-v)]
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Originally Posted by babbagandu I have this series (1-v^39) + (1-v^36) +(1-v^33).....+(1-v^3) I added up all the 1's and was left with: 13-(v^3 +v^6....+v^39) Factored out v^3 13- v^3(1+v^3 +..... v^36) So I get 13 - v^3 * [(1-v^37)/(1-v)] I think in the last term you want $\displaystyle \frac{1-v^{39}}{1-v^3} $
Originally Posted by Danny I think in the last term you want $\displaystyle \frac{1-v^{39}}{1-v^3} $ Ooooh. Ok thanks
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