![Excel 2016: How to Find the Mathematical Sum of a Series (Sigma Summation Notation). [HD] - YouTube](https://i.ytimg.com/vi/eaei7DN6Z9M/maxresdefault.jpg "Excel 2016: How to Find the Mathematical Sum of a Series (Sigma Summation Notation). [HD] - YouTube")
Excel 2016: How to Find the Mathematical Sum of a Series (Sigma Summation Notation). [HD] - YouTube
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