Рябушко А.П. ИДЗ 5.2 вариант 18

DHS - 5.2
№1.18. Prove that the function f (x) = tg (x 2 + 2x); φ (x) = x2 + 2x as x → 0 are the infinitesimal of the same order of smallness.
№2.18 Find limits.
№3.18 investigate these functions continuity and build their schedules.
№4.18 investigate these functions continuity at these points. f (x) = 3x / (x - 4); x1 = 4; x2 = 5.

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