Не понимаю как именно решить. Помогите, если не трудно

Не понимаю как именно решить. Помогите, если не трудно
- Предмет:
  Алгебра
- Автор:
  kristinamcbride
- 5 лет назад

Ответы 1

{2x + 2a >= 5 - 5x{-3x >= a{7x - 5 >= -2a{-3x >= a{7x - 5 >= -2a{3x <= -a{7x - 5 >= -2a{6x <= -2aЗапишем данную систему неравенств одной строкой:6x <= -2a <= 7x - 5Получается 6x <= 7x - 50 <= x - 5x ≥ 52a <= -6xa <= -3x ⇒ a ≤ -15.2a >= 5 - 7x2a >= 5 - 7*5 = -30a ≥ -15Получается, что решения есть только при а = 15 (x ≥ 5), при других а решений нет.
- Автор:
  karleemusk
- 5 лет назад
- 0
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Не понимаю как именно решить. Помогите, если не трудно

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