Talk:Square pyramidal number: Difference between revisions

Content deleted Content added
Line 90:
 
Returning to the introduction to this talk page, seems that this geometric derivation is a little more ''direct'' than the algebraic presented in the article.
 
In the article "Summation" i entered the talk: "Sum of the first n cubes (geometrical proof)".
 
--[[User:Ancora Luciano|Ancora Luciano]] ([[User talk:Ancora Luciano|talk]]) 06:15, 22 May 2013 (UTC)