Question

2) Media aritmetica a numerelor a=2,5 si b=1,28

Answer 1

1,89 este  rezultatul

Answer 2

$\displaystyle a=2,5 \\ b=1,28 \\ m_a= \frac{a+b}{2} = \frac{2,5+1,28}{2} = \frac{3,78}{2} =1,89$