[tex]\nu_1=79,1 \ Hz \\ \nu_2=1360 \ Hz \\ v=340 \ m/s \\ \boxed{\lambda_1-?} \\ \boxed{\lambda_2-?} \\ \bold{Rezolvare:} \\ \boxed{\lambda_= \frac{v}{\nu}} \\ \Rightarrow \lambda _1= \frac{v}{\nu_1} ; \ \lambda_2= \frac{v}{\nu_2} \\ \Rightarrow \lambda_1= \frac{340 \ m/s}{79,1 \ Hz} =\boxed{4,3 \ m}; \\ \Rightarrow \lambda_2= \frac{340 \ m/s}{1360 \ Hz} =\boxed{0,25 \ m}.[/tex]
