[tex]\left(\frac{2}{5}\right)^x\left(\frac{25}{8}\right)^x=\left(\frac{2}{5}\frac{25}{8}\right)^x=\left(\frac{5}{4}\right)^x
\left(\frac{5}{4}\right)^x=\frac{125}{64}
\frac{125}{64}=\left(\frac{5}{4}\right)^3
\left(\frac{5}{4}\right)^x=\left(\frac{5}{4}\right)^3
Daca a^{f\left(x\right)}=a^{g\left(x\right)} , atunci f\left(x\right)=g\left(x\right)
x=3[/tex]
