Optimal evaluations for the Sándor-Yang mean by power mean

Zhen-Hang Yang, Yu-Ming Chu

In this paper, we prove that the double inequality $M_p(a,b)<B(a,b)<M_q(a,b)$a, b>0$with$a\neq b$ifandonlyif$p\leq 4\log 2/(4+2\log 2-π)=1.2351\cdots$ an…