Предмет: Алгебра, автор: tunaginvlad

решите пожалуйста это

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Автор ответа: shahmuradovmurad07

Ответ:

При всех y, кроме y = -7

Объяснение:

$\frac{3}{y + 7} = \frac{3}{-7 + 7} = \frac{3}{0}$

Выражение имеет смысл, когда знаменатель не равен 0.

Если возникли вопросы - задавайте, помогу. :)

Автор ответа: starnadeika

это выражение не будет иметь смысла, если у + 7 будет равно 0, потому что на ноль делить нельзя, отсюда

у + 7 ≠ 0

у ≠ -7

При всех остальных значениях выражение будет иметь смысл, или

у ∈ (-∞ ; -7) ∪ (-7 ; +∞)

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