\[\boxed{\text{259}\text{\ (259)}\text{.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ \sqrt[8]{x - 2} \Longrightarrow x - 2 \geq 0 \Longrightarrow\]
\[\Longrightarrow x \geq 2;\]
\[\textbf{б)}\ \sqrt[4]{\frac{9 - x}{5}} \Longrightarrow 9 - x \geq 0 \Longrightarrow\]
\[\Longrightarrow x \leq 9;\]
\[\textbf{в)}\ \sqrt[3]{x + 5} \Longrightarrow имеет\ смысл\ \]
\[при\ любом\ x;\]
\[\textbf{г)}\ \sqrt[8]{3a - 5} \Longrightarrow 3a - 5 \geq 0 \Longrightarrow\]
\[\Longrightarrow 3a \geq 5 \Longrightarrow a \geq \frac{5}{3};\]
\[\textbf{д)}\sqrt[4]{- 5y + 6} \Longrightarrow - 5y + 6 \geq 0 \Longrightarrow\]
\[\Longrightarrow 5y \leq 6 \Longrightarrow y \leq 1\frac{1}{5};\]
\[\textbf{е)}\ \sqrt[12]{\frac{6b - 9}{11}} \Longrightarrow 6b - 9 \geq 0 \Longrightarrow\]
\[\Longrightarrow 6b \geq 9 \Longrightarrow b \geq 1,5.\]