Question

logaritm in baza 3 din 7 +logaritm in baza 3 din 7/9

Answer 1

lob 7 + log 7 - log 3^2 = 2log7  -  2, pune tu bazele logaritmilor, adica 3, te rog.

Answer 2

$log_37+log_3 \frac{7}{9}=log_3(7* \frac{7}{9} )=log_3 \frac{49}{9} =log_3( \frac{7}{3})^2=2log_3 \frac{7}{3} =2log_37-2$