Предмет: Алгебра, автор: Fox327

8класс,ребятки
помогите!!!Кто чем может)))
1.Среди пар чисел 253 и 356
752 и -52
-117 и -358
найдите те,которые при делении на 3 дают равные остатки(сравнимы по модулю 3)
жду,жду,жду
мяу.

Ответы

Автор ответа: Варан
0
253 -52  -358    ост. 1

356   и 752    ост 2


Автор ответа: Fox327
0
в ответах записано,что752 и (-52)(mod 3)
Автор ответа: Варан
0
но 752 - ост 2, а -52 ост 1
Автор ответа: Варан
0
никак не понял эти сравнения, извини
Автор ответа: Варан
0
я понял... надо так ..752 = (-52)(mod 3),поскольку 752-(-52)=804:3
Автор ответа: Варан
0
752 ≡ (-52)(mod 3),поскольку 752-(-52)=804:3

253≠356(мод3),поскольку 253-356=-103(на 3 не делится)
-117≠-358(мод3),поскольку -117-(-358)=241(на 3 не делится)
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