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

User:Aops-g5-gethsemanea2/AoPS Wiki

< User:Aops-g5-gethsemanea2
Revision as of 07:26, 7 August 2020 by Aops-g5-gethsemanea2 (talk | contribs) (Created page with "{{Template:Aops-g5-gethsemanea2/Header}} This is just a copy of the AoPS Wiki main page. __NOTOC__ __NOEDITSECTION__ <div class="frontlink" style="background-color:#1b365d;...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)




Social Media by CreativeHedgehog avatar.jpg

This is just a copy of the AoPS Wiki main page.

Welcome to the AoPS Wiki!

The AoPS Wiki project is administered by the Art of Problem Solving for supporting educational content useful to avid math students.

Problem of the Week

1983 AIME, Problem 13

For $\{1, 2, 3, \ldots, n\}$ and each of its non-empty subsets a unique alternating sum is defined as follows. Arrange the numbers in the subset in decreasing order and then, beginning with the largest, alternately add and subtract successive numbers. For example, the alternating sum for $\{1, 2, 3, 6,9\}$ is $9-6+3-2+1=5$ and for $\{5\}$ it is simply $5$. Find the sum of all such alternating sums for $n=7$.

New to the AoPS Wiki?

If you don't know much about how to edit a wiki, you might want to read the tutorial and the help files. You can also read what AoPSWiki is not. Lastly, please read the policies of the AoPSWiki before editing, and why AoPSWiki is different from other online resources.

AoPSWiki runs on the MediaWiki software.

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=User:Aops-g5-gethsemanea2/AoPS_Wiki&oldid=130966"