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