Предмет: Алгебра, автор: dudikdia

Помогите пожалуйста)) с решением

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Автор ответа: NNNLLL54

0

Ответ 2.
$(18,91)^{5x-7} geq 1,\\(18,91)^{5x-7} geq (18,91)^0\\5x-7 geq 0\\x geq 1,4\\xin [1,4;+infty)$

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