Question

14. Calculaţi media aritmetică a următoarelor numere raționale pozitive:

a)7/2;5/4;7/8
b)1/2;2/3;3/4
c)2/3;5/6;1/9;
d)5/3;3/4;9/8
Pls dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

a)

(7/2 + 5/4 + 7/8) : 3 = (28/8 + 10/8 + 7/8) : 3 = 45/8 : 3 = 45/8 * 1/3 = 15/8

b)

(1/2 + 2/3 + 3/4) : 3 = (6/12 + 8/12 + 9/12) : 3 = 23/12 : 3 = 23/12*1/3 = 23/36

c)

(5/3 + 3/4 + 9/8) : 3 = (40/24 + 18/24 + 27/24) : 3 = 85/24 : 3 = 85/24*1/3 = 85/72