Вариант 7 ИДЗ 5.2

EDS - 5.2
№1.7 Prove that the functions f (x) = √1 + x - 1; φ (x) = 2x as x → 0 are infinitesimal of the same order of smallness.
№2.7 Find the limits.
No. 3.7 To investigate these functions for continuity and build their graphs.
№4.7 Investigate these functions for continuity at the specified points. f (x) = ....; x1 = 4; x2 = 5;