Предмет: Алгебра, автор: lolokek51

Докажите что при любом целом n значение выражения:
n³-n кратно 6​

Ответы

Автор ответа: nafanya2014
2

n³-n=n(n²-1)=n(n-1)(n+1)

произведение трех последовательных натуральных чисел.

Среди них одно кратно 3, среди двух из них одно кратно 2.

Все произведение кратно 6

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