Răspuns:
Media geometrica este
[tex] \sqrt{a \times b} [/tex]
Explicație pas cu pas:
a)
[tex] \sqrt{12 \times 3} = \sqrt{36} = 6[/tex]
b)
[tex] \sqrt{8 \times 2} = \sqrt{16} = 4 [/tex]
c)
[tex] \sqrt{18 \times 8} = \sqrt{144} = 12[/tex]
d)
[tex] \sqrt{3 \times \frac{1}{5} \times 5} = \sqrt{15 \times \frac{1}{5} } = \sqrt{3} [/tex]
e)
[tex] \sqrt{ \frac{7}{12} \times 2 \times \frac{1}{3} } = \sqrt{ \frac{7}{6} \times \frac{1}{3} } = \sqrt{ \frac{7}{18} } = \frac{ \sqrt{7} }{3 \sqrt{2} } [/tex]
f)
[tex] \sqrt{ \sqrt{5} ^{ - 1} } \times \frac{ \sqrt{5} }{16} = \sqrt{ \frac{1}{ \sqrt{5} } \times \frac{ \sqrt{5} }{16} } = \sqrt{ \frac{1}{16} } = \frac{1}{4} [/tex]
