Given a postive integers x and n, we are asked to evaluate the following summation:
where: the symbol "" and "" are the floor and ceil functions, respectively.
For example, if and , we have:
>> S = @(x,n) sum(arrayfun(@(i) ceil(nthroot(i-1,n))+floor(nthroot(i+1,n)),1:x));
>> s = S(50,3)
>> s =
279
Solve

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Last Solution submitted on Aug 04, 2026

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William Chris Cleveland George Berken David Hill

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