贵刊 2 0 0 3年第 4期《轮换对称不等式的证明技巧》一文中例 8和例 1 0的证明犯了一个常识性错误 .为方便叙述 ,把原文摘录如下 :例 8　已知a ,b,c∈R+ ,求证 :ab+c+ba +c+ca +b≥ 32 .分析 :将常数 32 均匀分解到左式各项中 ,待证不等式等价于ab+c-12 +ba +c-12 +ca +b-12 ≥ The proof of Example 8 and Example 10 in the article “Proof of Rotation Symmetrical Inequality” in the 3rd edition of 2003 was a common-sense error. For the convenience of the narrative, the original is extracted as follows: Example 8 Known a , b, c∈R+, verification: ab+c+ba+c+ca+b≥ 32. Analysis: Decompose the constant 32 evenly into the left ones. The inequality is equal to ab+c-12 +ba + C-12 +ca +b-12 ≥