Предмет: Алгебра, автор: v962878

.........20 балов даю​

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Автор ответа: pushpull
0

Ответ:

в объяснении

Объяснение:

График функции    \displaystyle y=\frac{1}{x}   - это гипербола в первой и третьей четверти. В первой четверти функция > 0. Следовательно, выбираем промежутки те, у которых границы   положительны.

(-2; 1]           функция не везде положительна

\displaystyle \bigg[-\frac{1}{2} ;\frac{1}{2} \bigg]      функция не везде положительна

[1; 1.5]         функция положительна

[-9; 9]          функция не везде положительна

(14;17]         функция положительна

(0; 13)         функция положительна

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