Răspuns:
Explicație pas cu pas:
[tex](\dfrac{2}{3})^x*\dfrac{9}{8} =\dfrac{27}{64} ,~~=>~(\dfrac{2}{3})^x= \dfrac{27}{64}:\dfrac{9}{8},~~=>~(\dfrac{2}{3})^x= \dfrac{27}{64}*\dfrac{8}{9},~~=>~(\dfrac{2}{3})^x= \dfrac{3}{8},~~=>~x=log_{\frac{2}{3} }\dfrac{3}{8}.[/tex]
