Предмет: Алгебра, автор: evgeniivnaevgenia05



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Дано -2/3≤а≤2,5 оцініть значення виразу 2а-1

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Автор ответа: Universalka
1

-\frac{2}{3}\leq a\leq2,5\\\\-\frac{2}{3} \cdot 2\leq 2a\leq 2,5\cdot 2\\\\-1\frac{1}{3} \leq2a\leq5\\\\-1\frac{1}{3} -1\leq2a-1\leq5-1\\\\\boxed{-2\frac{1}{3}\leq 2a-1\leq4}

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