Summation

[lmartinez]

How can I put the correct summation in my formula ? If you will see D seen undefined.

With attached Mathcad Prime ..

[Fred_Kohlhepp · Accepted solution]

You define a dimension D at the top of the sheet, so your table doesn't define. Change the name in your table (and keep your vector indices straight, and all works out!)

[lmartinez]

I did not notice that I defined D twice, Now my spreadsheet are working right. Thank you.