Предмет: Математика, автор: Аноним

д 236. При каких значениях b сумма b152 + 217 делится на 9?​

Ответы

Автор ответа: nkungurov
8

Ответ:

при b, дающим, при делении на 9 единицу.

Пошаговое объяснение:

217/9=какое-то число (ост 1)

152/9=какое-то число (ост 8)

следовательно 152 * (9n)+1 + 217 будет кратно 9

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