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文[1]为证明不等式,巧妙地对“1”变形,使其符合运用均值不等式及等号成立的条件.为了使同学们更清楚地看到问题的本质,下面对原文给予注解(另解)与补充.
[1] In order to prove the inequality, the subtle transformation of “1 ” is made to conform to the condition of using mean inequality and equal sign.In order to make students see the essence of the question more clearly, (Another solution) and supplements.