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[不等式] 绝对值不等式

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大佬最帅 posted 2021-7-30 10:00 |Read mode
Screenshot_20210730_100002.jpg
能用放缩解一下这个吗

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hbghlyj posted 2021-8-1 09:09
码一下
$\frac{a b+b c+c a}{(a+b)(b+c)(c+a)}<\frac{1}{7}\left(\frac{1}{|a-b|}+\frac{1}{|b-c|}+\frac{1}{|c-a|}\right)$
类似题
artofproblemsolving.com/community/c6h1294532p6862994
artofproblemsolving.com/community/c6h1615250p10095942

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其妙 posted 2021-8-3 17:21
回复 1# 大佬最帅

see here:blog.sina.com.cn/s/blog_54df069f0102z3b5.html

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