Art of Problem Solving
AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy
Small live classes for advanced math
and language arts learners in grades 2-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

Sums and Perfect Sqares

Revision as of 12:17, 14 June 2019 by Colball (talk | contribs)

Here are many proofs for the Theory that $1+2+3+...+n+1+2+3...+(n-1)=n^2$

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=Sums_and_Perfect_Sqares&oldid=106301"