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gossipqueen
@gossipqueen
July 2022
0
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Докажите, что для любого натурального n, верно равенство:
1) (n+1)!-n!=n!n
2) (n+1)!-n!+(n-1)!=(n^2+1)(n-1)!
3) (n-1)!/n! - n!/(n+1)! = 1/n(n+1)
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