Рябушко А.П. ИДЗ 5.2 вариант 4

DHS - 5.2
№1.4 Prove that the function f (x) = sin 3x - sin x; φ (x) = 5x as x → 0 are the infinitesimal of the same order of smallness.
№2.4 Find limits.
№3.4 investigate these functions continuity and build their schedules.
№4.4 investigate these functions continuity at these points. f (x) = (x- 5) / (x + 3); x1 = -2; x2 = -3;

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