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[函数] 一个函数方程题

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等待hxh Posted at 2014-5-7 18:02:38 |Read mode

（这是个神题，最初论坛有老师发过，不知道源题何处，寻简证！）

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Author| 等待hxh Posted at 2014-5-7 20:32:22

原来是道竞赛题，我把我的方法修改下blog.sina.com.cn/s/blog_c50749e40101hszc.html

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