Ryabushko A.P. IDZ 5.2 option 7

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