A problem by Bogdan Simeonov

Level pending

The natural numbers n and k are both divisible by 2 and ( n + 1 ) k 1 = n ! (n+1)^k - 1 = n! .What is n + k ?


The answer is 6.

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1 solution

Narayan Kumar
Mar 7, 2014

here n=4&k=2 because (4+1)^2-1=4!

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