Question

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

Answer 1

Ответ:

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