Решить неравенствоf'(x) < 0, если f(x)=3x²-9х-1\3 умножить х³Помогите, пожалуйста - №21392024

Решить неравенство
f'(x) < 0, если f(x)=3x²-9х-1\3 умножить х³
Помогите, пожалуйста
- Предмет:
  Алгебра
- Автор:
  eden99
- 6 лет назад

Ответы 1

f'(x)=6x-9-x²x²-6x+9=0x=6/2=3(x-3)(x-3)<0Методом интервалов:x ∈ (3; +∞)
- Автор:
  samvillegas
- 6 лет назад
- 0
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Помогите, пожалуйста. Заранее спасибо))

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