Ineq

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Octav Ganea
Euclid
Posts: 15
Joined: Mon Oct 01, 2007 9:12 pm

Ineq

Post by Octav Ganea »

Fie \( a_1, a_2, ... a_n \) numere reale cu
\( a_1+a_2+....a_n \geq \sqrt{(n-1)(a_1^2+a_2^2+...+a_n^2)} \).
Sa se arate ca toate numerele sunt mai mari strict decat 0
red_dog
Euclid
Posts: 26
Joined: Wed Sep 26, 2007 8:33 pm

Post by red_dog »

Inegalitatea din enunt ar trebui sa fie stricta, altfel ea se verifica si cand toate numerele sunt 0.
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