Question

(1/2*3/4)*(2/3*4/5)*(5/6*7/8)*(6/7*8/9)

Answer 1

$frac{1}{2} times frac{3}{4} times frac{2}{3} times frac{4}{5} times frac{5}{6} times frac{7}{8} times frac{6}{7} times frac{8}{9} = \ = frac{1}{9}$

Сокращаем: 2; 3; 4; 5; 6; 7; 8.

Ответ: 1/9