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关于指数、Neuman-Sándor和二次平均的一个精确双向不等式 被引量:3

A sharp double inequality involving identric, Neuman-Sndor, and quadratic means
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摘要 本文证明了双向不等式αI(a,b)+(1-α)Q(a,b)<M(a,b)<βI(a,b)+(1-β)Q(a,b)对所有不相等的正实数a和b成立当且仅当α≥1/2和β≤[e(2(1/2)log(1+2(1/2))-1)]/[(2(1/2)e-2)log(1+2(1/2))]=0.4121···,其中I(a,b),M(a,b)和Q(a,b)分别表示a和b的指数平均、Neuman-Sándor平均和二次平均. In this article, we prove that the double inequality…… holds for all a, b 〉 0 with a ≠ b if and only if where I(a, b), M(a, b) and Q(a, b) are the identric, Neuman-S^ndor and quadratic means of a and b, respectively.
出处 《中国科学:数学》 CSCD 北大核心 2013年第6期551-562,共12页 Scientia Sinica:Mathematica
基金 国家自然科学基金(批准号:11071069和11171307)资助项目
关键词 指数平均 Neuman-Sándor平均 二次平均 identric mean, Neuman-Sandor mean, quadratic mean
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参考文献29

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二级参考文献29

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