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Автор - Yudil

Решите систему неравенств:

Ответ

Проверено экспертом

Автор - mmb1

x² - 4x + 3 ≤ 0

D=16 - 12 = 4

x12 = (4 +- 2)/2 = 1  3

(x - 1)(x - 3) ≤ 0

метод интервалов

++++++++++[1] ------------- [3] +++++++++

x ∈ [1, 3]

(x + 2)(x + 4)/5x ≤ 0

метод интервалов

-----------[-4] +++++++++ [-2] -------------(0) +++++++++++++

x ∈ (-∞, -4] U [-2, 0]

пересекаем с первым ответом x ∈ [1, 3]

пересечений нет, решений нет x ∈ ∅

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