Question

помогите решить 21/22*22/21*23/24*24/23*25/26*26/25*27/28*28\27*29/30 = ?

Answer 1

Ответ:

$\frac{21}{22}$ * $\frac{22}{21}$ * $\frac{23}{24}$ * $\frac{24}{23}$ * $\frac{25}{26}$ * $\frac{26}{25}$ * $\frac{27}{28}$ * $\frac{28}{27}$ * $\frac{29}{30}$ = $\frac{29}{31}$