Monday, May 13, 2013

For the following series, express the finite sum in summation notation: 3 − 9 + 27 − 81 + 243 − 729

these numbers are all powers of 3 with 3^1=3 up to 3^6=729. Therefore 
%0D%0Asum%283%5Ei%2Ci=1%2C6%29%0D%0A
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