宇部工業高等専門学校研究報告

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宇部工業高等専門学校研究報告 Volume 57
published_at 201103

Deduction of “The Law of 72” : How many years to receive interest equal to the amount of the principal deposit

「７２の法則」の導出 : 複利で元利合計が２倍になる年数の目安を得る演習問題として
Matsuura Toshiharu
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UN20057000005.pdf
About This Article
Descriptions
“The Law of 72” is deduced. “The Law of 72” reveals to us the years to receive interest equal to the amount of the principal deposit. We applied natural logarithm, approximation, power series, integral and Maclaurin expansion.
Creator Keywords
Law of 72
approximation
natural logarithm
power series
Maclaurin expansion
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