Media geometrică: [tex]M_{G}(a, b) = \sqrt{ab}[/tex]
[tex]M_{G}(0.81; 0.49) = \sqrt{0.81 \cdot 0.49} = \sqrt{81 \cdot 10^{-1} \cdot 49 \cdot 10^{-1}} = \sqrt{7^{2} \cdot 9^{2} \cdot (10^{-1})^{2}} = 7 \cdot 9 \cdot 10^{-1} =\boxed{6.3}[/tex]
