Question

$\left \{ {{1-2y \geq 0} \atop {4y-1 \geq 0}} \right.$

Answer 1

$\left \{ {{-2y \geq -1} \atop {4y \geq 1}} \right. \left \{ {y \leq 0,5} \atop {y \geq 0,25}} \right.$
Ответ:x∈[0,25;0,5]