04-24-2014, 03:58 AM
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#5
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the Mathemagician~
 
Join Date: Nov 2005
Location: Quebec City
Age: 33
Posts: 1,320
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Re: [Math] Summation Help
The formula only works for k=1. If you have a summation that starts from another number, you can split the summation:
Sum(k to n) = Sum(1 to n) - Sum(1 to k-1)
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