Optimal Bounds for Neuman–sándor Mean in Terms of the Convex Combination of Logarithmic and Quadratic or Contra–harmonic Means
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چکیده
In this article, we present the least values α1 , α2 , and the greatest values β1 , β2 such that the double inequalities α1L(a,b)+(1−α1)Q(a,b) < M(a,b) < β1L(a,b)+(1−β1)Q(a,b) α2L(a,b)+(1−α2)C(a,b) < M(a,b) < β2L(a,b)+(1−β2)C(a,b) hold for all a,b > 0 with a = b , where L(a,b) , M(a,b) , Q(a,b) and C(a,b) are respectively the logarithmic, Neuman-Sándor, quadratic and contra-harmonic means of a and b . Mathematics subject classification (2010): 26E60.
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تاریخ انتشار 2014