Предмет: Алгебра, автор: ChristinkaSmile

3 и 5 уравнение. Срочно нужно!

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Автор ответа: danis94

0

в 3
x*7^(x)=49*7^x сокращаем 7^x
x=49
в 5 ОДз 2x-3>0 x>2/3
по свойствам логарифмов(приложение номер 8)
2x-3=14
x=8,5 входит в ОДЗ

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