Sharp Inequalities between Harmonic, Seiffert, Quadratic and Contraharmonic Means

Gen-Di Wang, Chen-Yan Yang, Yu-Ming Chu

In this paper, we present the greatest values $\alpha$, $\lambda$ and $p$, and the least values $\beta$, $\mu$ and $q$ such that the double inequalities $αD(a,b)+(1-α)H(a,b)<T(a,b)<βD(a,b)+(1-β) H(…