2}}\atop {3a-1\leq 8} \right. \Rightarrow \left \{ {{-4a \leq 2-6} \atop {-a>2-6}}\atop{3a \leq 8+1} \right. \Rightarrow \left \{ {a \geq 1}\atop {a<4\atop {a \leq 3}}\right. \Rightarrow 1 \leq a \leq 3" alt=" \left \{ {{6-4a \leq 2} \atop {6-a>2}}\atop {3a-1\leq 8} \right. \Rightarrow \left \{ {{-4a \leq 2-6} \atop {-a>2-6}}\atop{3a \leq 8+1} \right. \Rightarrow \left \{ {a \geq 1}\atop {a<4\atop {a \leq 3}}\right. \Rightarrow 1 \leq a \leq 3" align="absmiddle" class="latex-formula">
Ответ. [1;3]