Предмет: Алгебра, автор: oleksandrahalilova

Відомо, що 3<x<8, 2<y<6. Оцінити значення виразу 2x+y

Ответы

Автор ответа: NNNLLL54

1

Ответ:

Оценить значение выражения . Применяем свойства неравенств .

$3 < x < 8\ \ \Big|\cdot 2\ \ \ \Rightarrow \ \ \ 6 < 2x < 16\\\\2 < y < 6$

Сложим последние два неравенства, получим

$\bf 8 < 2x+y < 22$

rubkub31: а можешь мне помочь с геометрией???

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