Logaritmi
Posted: Sun Mar 07, 2010 2:03 pm
Fie \( n\geq 2 \) un numar natural. Sa se determine numerele reale \( a_1,a_2,...,a_n\in(1,\infty) \) stiind ca \( a_1a_2\cdot...\cdot a_n=2^n \) si:
\( \log_{a_{1}}{(a_1-1)}+\log_{a_{2}}{(a_2-1)}+...+\log_{a_{n}}{(a_n-1)}=0 \)
Gazeta Matematica- Dan Seclaman si Lucian Tutescu
\( \log_{a_{1}}{(a_1-1)}+\log_{a_{2}}{(a_2-1)}+...+\log_{a_{n}}{(a_n-1)}=0 \)
Gazeta Matematica- Dan Seclaman si Lucian Tutescu