Monday, August 14, 2017

algebra precalculus - What is the term for a factorial type operation, but with summation instead of products?

(Pardon if this seems a bit beginner, this is my first post in math - trying to improve my knowledge while tackling Project Euler problems)



I'm aware of Sigma notation, but is there a function/name for e.g.



4+3+2+110,



similar to 4!=4321,

which uses multiplication?



Edit: I found what I was looking for, but is there a name for this type of summation?

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