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THE FLOOR OF THE ARITHMETIC MEAN OF THE CUBE ROOTS OF THE FIRST $n$ INTEGERS

Published online by Cambridge University Press:  08 January 2020

BOONYONG SRIPONPAEW
Affiliation:
Department of Mathematics, Faculty of Science, Burapha University, Thailand email boonyong@buu.ac.th
SOMKID INTEP*
Affiliation:
Department of Mathematics, Faculty of Science, Burapha University, Thailand Center of Excellence in Mathematics, CHE, Bangkok10400, Thailand email intep@buu.ac.th

Abstract

Zacharias [‘Proof of a conjecture of Merca on an average of square roots’, College Math. J.49 (2018), 342–345] proved Merca’s conjecture that the arithmetic means $(1/n)\sum _{k=1}^{n}\sqrt{k}$ of the square roots of the first $n$ integers have the same floor values as a simple approximating sequence. We prove a similar result for the arithmetic means $(1/n)\sum _{k=1}^{n}\sqrt[3]{k}$ of the cube roots of the first $n$ integers.

Type
Research Article
Copyright
© 2020 Australian Mathematical Publishing Association Inc.

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Footnotes

The authors were supported by the Faculty of Science, Burapha University, Thailand.

References

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