Question

пж решите
математика...​

Answer 1

Ответ:

3)[7;10] 4)(-9;-1]

Пошаговое объяснение:

Вот

Answer 2

Решение:

$3) \left \{ {{-x \leq -7} \atop {x\leq10}} \right. \\\\ \left \{ {{x \geq 7} \atop {x\leq10}} \right. \\\\ x\in [7; 10]$

$4) \left \{ {{x \leq -1} \atop {-x \leq 9}} \right. \\\\ \left \{ {{x \leq -1} \atop {x \geq -9}} \right. \\\\ x \in [-9; -1]$