Предмет: Алгебра, автор: ovcarenko568

Знайти суму всіх натуральних чисел,які кратні числу 8 і не перевищують числа 480

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Автор ответа: Guppy2016

самое меньшее кратное 8 это 8,к следующим числам нужно прибавить 8 чтобы получилось следующее кратное

решим задачу с помощью арифметической прогрессии:

последняя строчка

Sₙ=14640

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