Formulas of summation notation, Mathematics

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Formulas

Now there are a couple of nice formulas which we will get useful in a couple of sections. Consider that these formulas are only true if starting at i = 1. You can, obviously, derive other formulas from these for different starting points if you require to.

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Here is a quick illustration on how to use such properties to quickly calculate a sum that would not be easy to do through hand.

 

 


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