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Notam cu mg media proportionala a numerelor a si b stiind ca : a) a = 9 si mg = 18

Răspuns :

a)
Mp=√a*b
Mg=√a*b=18
a*b=18^2
b=(18^2)/a
b=16
Deci Mp=√16*9=√144=12
b)
Mp=√a*b
Mg=√a*b=0,11
a*b=0,0121
b=0,0121/0,1=0,121
Deci Mp=√0.0121=0,11
[tex]m_g=\sqrt{a\;\cdot\;b}\\ \Downarrow\\ 18\;=\;3\sqrt{b}\;\;\Rightarrow\;\;18:3=\sqrt{b}\;\;\\ adic\u{a}:\;\;\sqrt{b}=6\;\rightarrow\;b=36 [/tex]