Question

Найдите обьединение числовых промежуток
1) (-∞;7) и (6; +∞)
2) (-∞;-4) и (-5; 2)

Answer 1

1) (–∞; 7) ∪ (6; +∞) = (–∞; +∞)

2) (–∞; –4) ∪ (–5; 2) = (–∞; 2)