... Grant 60850005 and theN S Foundation of Zhejiang Province under Grants Y7080185 and Y607128.References1 S. H. Wu, “Generalization and sharpness of the power means inequality and their applications,”Journal ... questions: what are the greatest values p and q, and the least values r and s, such that Mpa, b 2/3Ga, b1/3Ha, b Mra, b and Mqa, b 1/3Ga, b2/3Ha, b Msa, ... inequalities,” Journal of MathematicalAnalysis and Applications, vol. 161, no. 2, pp. 395–404, 1991.10 J. Chen and B. Hu, “The identric mean and the power mean inequalities of Ky Fan type,”...