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Вопрос по алгебре:
Выясните, является ли функция у=cosx - x^2четной или нечетной.-
Автор:
jasmine55
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Ответ:
Объяснение:Определим четность функции y = cos x - x^2.
Для того, чтобы определить четность функции, нужно в функцию вместо х подставить значение (-х).
Получаем:
y (-x) = cos (-x) - (-x)^2 = cos x - x^2 = y (x);
Так как, y (-x) = y (x), то функция четная.
Ответ: функция y = cos x - x^2 четная.
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