Question

Cum calculez media aritmetica a numerelor a si b, a=$\frac{5}{3} - \frac{3}{7}$.....b= $\frac{1}{3} + \frac{3}{7}$

Answer 1

5/3-3/7=35/21-9/21=26/21
1/3+3/7=7/21+9/21=16/21
a+b=26/21+16/21=42/21=2
(a+b)/2=2/2=1

Answer 2

media aritmetica = a + b / 2
a+b =  5/ 3 - 3/7 + 1/3 + 3/7 = 5/3 + 1/3 = 6/3 = 2 (-3/7 + 3+7 = 0)
m.a. = 2/2 = 1