Question

Daca a+b=6,atunci media aritmetica a numerelor a ²;b²si 2ab este egala cu...

Answer 1

$m_{a} ( a^{2}; b^{2}; 2ab)= \frac{ a^{2}+ b^{2}+2ab }{3}= \frac{ (a+b)^{2} }{3} = \frac{ 6^{2} }{3}= \frac{36}{3}=12.$