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Консультация № 194850
02.03.2019, 11:26
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Здравствуйте! Прошу помощи в следующем вопросе:
Прикрепленные файлы:
Обсуждение
04.03.2019, 08:49
общий
это ответ
Здравствуйте, Gheka0740!
Рассмотрим первое задание. Будем считать, что имеются в виду вещественные корни.
Видно, что в обеих частях преобразованного уравнения находятся выражения типа "куб числа плюс число". Поэтому введём возрастающую функцию
(то, что функция возрастает, видно из положительности её первой производной 
). Тогда из последнего уравнения получим
Дискриминант положителен и уравнение имеет два корня, если
что и является ответом к заданию.
Рассмотрим первое задание. Будем считать, что имеются в виду вещественные корни.
Видно, что в обеих частях преобразованного уравнения находятся выражения типа "куб числа плюс число". Поэтому введём возрастающую функцию
(то, что функция возрастает, видно из положительности её первой производной ). Тогда из последнего уравнения получимДискриминант положителен и уравнение имеет два корня, если
что и является ответом к заданию.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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