Вариант 11 ИДЗ 5.2

EDS - 5.2
№1.11. Prove that the functions f (x) = 2x3; φ (x) = 5x3 / (4 - x) as x → 0 are infinitely small of the same order of smallness.
№2.11 Find the limits.
№3.11 Investigate these functions for continuity and build their graphs.
№4.11 Investigate these functions for continuity at the specified points. f (x) = (x - 3) / (x + 4); x1 = - 5; x2 = - 4.