Geodesic
A somewhat unexpected concavity
The Teaching of Mathematics, XVI (2013) no. 1, p. 18 Cet article a éte moissonné depuis la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

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This classroom note considers the slightly counterintuitive concavity of a rational function.
Classification : 1AMS97I40 2ZDMI45
Keywords: rational function, concavity. 
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     author = {Aaron Melman},
     title = {A somewhat unexpected concavity},
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     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2013_XVI_1_a3/}
}
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Aaron Melman. A somewhat unexpected concavity. The Teaching of Mathematics, XVI (2013) no. 1, p. 18 . http://geodesic.mathdoc.fr/item/TM2_2013_XVI_1_a3/