Предмет: Математика, автор: ksusha250301

Сколько трехзначных чисел можно составить используя только цифры 1,7,9 без повторения???;)
Спасибки тому кто решил!!!!

Ответы

Автор ответа: 12345пррр
0
179
197
971
917
719
791
значит 6 чисел

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