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Sharp bounds for power mean in terms of generalized Heronian mean. (English) Zbl 1218.26022

Summary: For \(1 < r < +\infty\), we find the least value \(\alpha\) and the greatest value \(\beta\) such that the inequality \(H_{\alpha}(a, b) < A_r(a, b) < H_{\beta}(a, b)\) holds for all \(a, b > 0\) with \(a \neq b\). Here, \(H_{\omega}(a, b)\) and \(A_r(a, b)\) are the generalized Heronian and the power means of two positive numbers \(a\) and \(b\), respectively.

MSC:

26D15 Inequalities for sums, series and integrals
26E60 Means
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