In this paper, we prove that the double inequality $M_{lpha}(a,b)N_{GQ}(a,b)M_{eta}(a,b)$holds for all $a,b0$ with $aeq b$ if and only if $lphaleq 2log2/(5log2-2logpi)=1.1785cdots$ and $etageq 4/3$.
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机译：在本文中，我们证明了双重不等式$ M _ { alpha}（a，b） 0 $和$ a neq b $且仅当$ alpha leq 2 log2 /（5 log2-2 log pi）= 1.1785 cdots $和$ beta geq 4/3 $时。
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