Предмет: Алгебра, автор: mak213

Решите неравенство пж. X(7-x)>0. Это из 8 класса)

Ответы

Автор ответа: Ртуть3

0

x(7-x)>0
Нули:
x=0
x=7
Определим знаки интервалов:
_______ 0 _________ 7 __________>
- + -
Ответ: x ∈ (0; 7)

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