Question

решить
$\frac{2m}{?4m + 4n} + \frac{4n}{?8m + 8n}$
дробный пример ​

Answer 1

$\frac{2m}{4m +4n } + \frac{4n}{8m + 8n} = \frac{2m}{2(2m + 2n)} + \frac{4n}{4(2m +2n) } = \frac{m}{2m + 2n} + \frac{n}{2m + 2n} = \frac{m + n}{2 m + 2n} = \frac{m + n}{2(m + n)} = \frac{1}{2}$