Question

1. Сократите дробь: 10+¹-10" 10+¹ +10​

Answer 1

$\frac{10^{n+1}-10^n}{10^{n+1}+10^n} = \frac{10^n\cdot 10^1-10^n}{10^n\cdot10^1+10^n}= \frac{10^n(10^1-1)}{10^n(10^1+1)}=\frac{9}{11}$