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最近阅读了罗先生的文章,深受启发,但觉得有些地方值得商榷,题目如下:问题1990(数学通报2011年第2期)已知
Recently read Mr. Luo’s article, inspired by, but think there are some places to be debatable, the title is as follows: Question 1990 (Mathematical Bulletin No. 2, 2011) Known