Difference between revisions of "Northeastern WOOTers Mock AIME I Problems/Problem 15"
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Revision as of 21:10, 7 August 2021
Problem 15
Find the sum of all integers such that where denotes the number of integers less than or equal to that are relatively prime to .
Solution
\begin{claim} if and only if is prime. \end{claim}
\begin{proof} F \end{proof}