Question

пож помогите номер 672

Answer 1

1) (1/11 + 4/11 + 6/11) + (1/5 + 4/5)= 2
2) (1/15+ 4/15) + (1/18 + 5/18) + (2/21 + 5/21) + (1/24 + 7/24) = 1/3 + 1/3 + 1/3 + 1/3 = 4/3