A note on monotonicity for generalized weighted mean values

A new proof of monotonicity for the generalized weighted mean values Mp,f (r, s; x, y) with either r and s or x and y is given.

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[2]  Feng Qi (祁锋),et al.  Note on monotonicity of generalized weighted mean values , 1999, Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.