Shortlist 2

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Antonache Emanuel
Euclid
Posts: 37
Joined: Sat Feb 28, 2009 4:15 pm
Location: Targoviste, Dambovita

Shortlist 2

Post by Antonache Emanuel »

Daca A,B sunt submultimi nevide arbitrare ale multimii \( {C} \), notam:
\( AB= \){\( {xy|x\in\mathbb{A}, y\in\mathbb{B} \)}. Fiind date numerele \( a\in\mathbb{C}* \) si \( n\in\mathbb{N}* \), sa se determine multimile \( X\subset{C} \) cu n elemente care satisfac proprietatea:
\( XX \subset \){\( a \)}\( X \)
Marcel Tena, Bucuresti, Shortlist 2002
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