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Napier's Inequality (I)


	Napier's inequality: If , then . Observe that in the graphic, , the slope of the secant line passing through and , is between the slopes of the tangent lines at and .


	Contributed by: Soledad Mª Sáez Martínez and Félix Martínez de la Rosa
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Reference: R. Nelsen, "Napier's Inequality (Two Proofs)," The College Mathematics Journal, 24(2), 1993 p. 165.

Napier's Inequality (Wolfram MathWorld)

"Napier's Inequality (I)" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/NapiersInequalityI/

Contributed by: Soledad Mª Sáez Martínez and Félix Martínez de la Rosa

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