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巧求最小值 若a、b、c>1/2,求 的最小值. 湖南长沙市十五中(410007)厉倩提 (答案在本期找)
Achieving the minimum value if a, b, c> 1/2, the minimum value of seeking. 15th in Changsha, Hunan (410007) Li Qianti (The answer is found in this issue)