Răspuns:
Sper ca te-am ajutat!))
Explicație pas cu pas:
a) (1/2 + 3/4 + 5/6) + (1/2 + 1/4 + 1/6) = (3/6 + 3/4 + 5/6) + (3/6 + 1/4 + 1/6) = 11/6 + 5/4 = (22/12) + (15/12) = 37/12.
b) (3/2 + 7/5 + 5/9) + (3/2 + 8/5 + 22/9) = (27/18 + 14/18 + 10/18) + (27/18 + 16/18 + 22/18) = 51/18 + 65/18 = 116/18 = 58/9.
