polinom ireductibil via Rouche

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Cezar Lupu
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polinom ireductibil via Rouche

Post by Cezar Lupu »

Desi o sa postez si problema la sectiunea algebra superioara, am s-o pun totusi aici prima oara avand in vedere ca solutia mea foloseste teorema lui Rouche din Analiza Complexa (asta ar fi un hint :) ). Insa, probabil, ar exista si alte solutii la ea. Iata problema:

Aratati ca pentru orice \( n\geq 2 \) polinomul \( x^{n}-x^{n-1}-x^{n-2}-\ldots -x-1 \) este ireductibil in corpul numerelor rationale.

American Mathematical Monthly, 1987
An infinite number of mathematicians walk into a bar. The first one orders a beer. The second orders half a beer. The third, a quarter of a beer. The bartender says “You’re all idiots”, and pours two beers.
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