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<h2 style="border-bottom: 1px solid; color: #1b365d;">New to the AoPS Wiki?</h2> | <h2 style="border-bottom: 1px solid; color: #1b365d;">New to the AoPS Wiki?</h2> | ||
| − | If you don't know much about how to edit a wiki, you might want to read the [[AoPS Wiki:Tutorial|tutorial | + | If you don't know much about how to edit a wiki, you might want to read the [[AoPS Wiki:Tutorial|tutorial]]. You can also read [[AoPS Wiki:What AoPS Wiki is not|what AoPS Wiki is not]]. Lastly, please read the [[:Category:Policy|policies]] and [[:Category:Guideline|guidelines]] of the AoPS Wiki before editing, and [[AoPS Wiki:What makes AoPS Wiki different|why AoPS Wiki is different from other online resources]]. |
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AoPS Wiki runs on the [[MediaWiki]] software. | AoPS Wiki runs on the [[MediaWiki]] software. | ||
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Revision as of 17:22, 15 March 2025
If you want to edit something on the main page, just edit this page and the administrators will take your suggestions into consideration.
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.
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 
is 
and for 
it is simply 
. Find the sum of all such alternating sums for 
.
New to the AoPS Wiki?
If you don't know much about how to edit a wiki, you might want to read the tutorial. You can also read what AoPS Wiki is not. Lastly, please read the policies and guidelines of the AoPS Wiki before editing, and why AoPS Wiki is different from other online resources.
AoPS Wiki runs on the MediaWiki software.
