Let $A_n=\{1,2,3,...,2n\}$. Show that any $(n+2)\text{-}$element subset of $A_n$ contains two integers whose sum is in that subset.
Any idea how to choose the pigeonholes please ?
2026-04-03 01:36:11.1775180171
How to choose the right pigeonholes
36 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in PIGEONHOLE-PRINCIPLE
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