The function (bx−ax)/x(b^x-a^x)/x: Logarithmic convexity and applications to extended mean values

preprint2009arXivOpen access

Abstract

In the present paper, we first prove the logarithmic convexity of the elementary function bx−axx\frac{b^x-a^x}x, where x≠0x\ne0 and b>a>0b>a>0. Basing on this, we then provide a simple proof for Schur-convex properties of the extended mean values, and, finally, discover some convexity related to the extended mean values.

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