Resposta :
[tex]M_g = \sqrt[n]{x_1 \cdot x_2 \cdot ... \cdot x_n} \\\\M_g = \sqrt{9 \cdot 4}\\M_g = \sqrt{36}\\M_g = 6\\\\\boxed{\boxed{a) \ 6}}[/tex]
[tex]M_g = \sqrt[n]{x_1 \cdot x_2 \cdot ... \cdot x_n} \\\\M_g = \sqrt{9 \cdot 4}\\M_g = \sqrt{36}\\M_g = 6\\\\\boxed{\boxed{a) \ 6}}[/tex]