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Note on the Fundamental Inequality Theorems connected with ex and xm

Published online by Cambridge University Press:  20 January 2009

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The subject of this note is that dealt with in Mr Tweedie's paper in the Proceedings, vol. XVII., 33–37, and my only reason for bringing it before the Society is to call attention to a slightly different method of presenting the same order of ideas. The method is that adopted by Peano, Lezioni di Analisi Infinitesimale, vol. I., §23, but as the book is not readily accessible to teachers, there may be some interest in having the method reproduced in our Proceedings. I add one or two remarks.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1900

References

* The reason for writing ex as the function of x which lies between (1 + x/m)m and (1−x/n)n is that

where M = mx. The inequalities hold whether x be positive or negative, but m, n must be positive.