Вариант 3 ИДЗ 5.2

EDS - 5.2
# 1.3. Prove that the functions f (x) = arctg2 (3x); φ (x) = 4x2 as x → 0 are infinitesimal of the same order of smallness.
№2.3 Find the limits.
№3.3 Investigate these functions for continuity and build their graphs.
№4.3 Investigate these functions for continuity at the specified points. f (x) = (x + 7) / (x-2); x1 = 2; x2 = 3;