Предмет: Алгебра, автор: lin6a

найдите множество значений функции: y=2cosx-7

Ответы

Автор ответа: AlbuRin

y=2cosx-7

Ф-ия y=cosx принимает значения -1 =< cosx =<1. Подставим min и max

значения косинуса.

Y min = 2*(-1) -7 = -9

Ymax = 2*1 - 7 = -5

Ответ. [-9; -5]

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