\[\boxed{\text{29\ (29).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\textbf{а)}\ \frac{3a + 12b}{6ab} = \frac{3 \cdot (a + 4b)}{3 \cdot 2ab} =\]
\[= \frac{a + 4b}{2ab}\]
\[\textbf{б)}\ \frac{15b - 20c}{10b} = \frac{5 \cdot (3b - 4c)}{5 \cdot 2b} =\]
\[= \frac{3b - 4c}{2b}\]
\[\boxed{\text{29.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
Пояснение.
Решение.
\[\textbf{а)}\frac{8^{16}}{16^{12}} = \frac{{(2^{3})}^{16}}{{(2^{4})}^{12}} = \frac{2^{48}}{2^{48}} = 1\]
\[\textbf{б)}\frac{81^{25}}{27^{33}} = \frac{\left( 3^{4} \right)^{25}}{\left( 3^{3} \right)^{33}} = \frac{3^{100}}{3^{99}} = 3^{1} =\]
\[= 3\]