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IMO_Taiwan
Re: [问题] IMO 2008 day2
楼主:
JGU
( )
2008-07-17 23:21:21
※ 引述《boggart0803 (幻形怪)》之铭言:
: Problem 4
: Find all functions f : (0,∞)→(0,∞) (so f is a function from the
: positive real numbers) such that
: (f(w))^2+(f(x))^2 w^2+x^2
:
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