Question

Упростите. 8/9•9/8, 10/11•11/10, 12/13•13/12, 14/15•15/14•16/17.​

Answer 1

Пошаговое объяснение:

1)

$\frac{8}{9} \times \frac{9}{8} = \frac{8 \times 9}{9 \times 8} = \frac{72}{72} = 1$

2)

$\frac{10}{11} \times \frac{11}{10} = \frac{110}{110} = 1$

3)

$\frac{12}{13} \times \frac{13}{12} = \frac{156}{156} = 1$

4)

$\frac{14}{15} \times \frac{15}{14} \times \frac{16}{17} = \frac{210}{210} \times \frac{16}{17} = 1 \times \frac{16}{17} = \frac{16}{17}$