Problem with multiplication n*(n+1)

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Laura Passalacqua
Laura Passalacqua 2020-5-31
评论： Steven Lord 2020-5-31
I want to change the index of this 3 summations using only one index, so I need to calculate j = 2*(n*(n+1)+m-1)+s for using the new index j.
Why does n*(n+1) generate an error?
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Image Analyst
Image Analyst 2020-5-31
You're not making it easy for us to help you, are you? Do you maybe have a picture of the formula with three sums that you can post (but only after reading this link)?
Steven Lord
Steven Lord 2020-5-31
What is the full and exact text of the error message you received? Show all the text displayed in red (and/or orange, if you also received warnings) in the Command Window when you run the code that performs the multiplication that throws the error.

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