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Hong Kong National Olympiad
1999 Hong kong National Olympiad
1
Find all rational r
Find all rational r
Source:
November 7, 2010
number theory unsolved
number theory
Problem Statement
Find all positive rational numbers
r
≠
1
r\not=1
r
=
1
such that
r
1
r
−
1
r^{\frac{1}{r-1}}
r
r
−
1
1
is rational.
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