Question

Calculati media aritmetica a numerelor 2,-1 si $\frac{1}{2}$

Answer 1

Ma=(a+b+c)/3
Ma=[2+(-1)+1/2]/3
Ma=[2-1+1/2]:3
Ma=(1+1/2):3  (aducem la acelasi numitor in prima paranteza amplificand cu 2)
Ma=(2/2+1/2):3
Ma=3/2:3
Ma=3/2x1/3 (3 cu 3 se simplifica)
Ma=1/2