Shortlist 11
Posted: Sun Mar 28, 2010 8:22 pm
Fie a,b,c numere strict pozitive satisfacand \( a^3+b^3+c^3=1 \). Aratati ca:
\( \sum log_a (\sqrt[3]3bc)>0 \).
I. V. Maftei, Bucuresti
\( \sum log_a (\sqrt[3]3bc)>0 \).
I. V. Maftei, Bucuresti