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[问题] IMO 2008 day2

楼主: boggart0803 (幻形怪)   2008-07-17 19:03:28
Problem 4
Find all functions f : (0,∞)→(0,∞) (so, f is a function from the
positive real numbers to the positive real numbers) such that
(f(w))^2+(f(x))^2 w^2+x^2
作者: myflame (原來隱起來了)   2008-07-17 19:06:00
有自信电子通讯设施防堵完善?XD
作者: JGU ( )   2008-07-17 19:50:00
怎么回事啊?
作者: myflame (原來隱起來了)   2008-07-18 00:29:00
可以请问本来po的假4,5,6题出典为何?想写看看^^
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