2.3

(a)

利率, nominal rate, r = 0.03
(1 + r / 12)¹² = (1 + 0.03 / 12)¹² = 1.0304
実効利率, effective interest rate = 1.0304 - 1 = 0.0304 = 3.04%

(b)

利率, nominal rate, r = 0.18
(1 + r / 12)¹² = (1 + 0.18 / 12)¹² = 1.1956
実効利率, effective interest rate = 1.1956 - 1 = 0.1956 = 19.56%

(c)

利率, nominal rate, r = 0.18
(1 + r / 4)⁴ = (1 + 0.18 / 4)⁴ = 1.1925
実効利率, effective interest rate = 1.1925 - 1 = 0.1925 = 19.25%

Python 3

コードを以下に示す。

2.3.py

Fortran

コードを以下に示す。(revised on 2019-09-17.)

2.3.f90

Gauche

コードを以下に示す。

2.3.scm

Javascript

コードを以下に示す。

2.3.js(2024-12-07 revise, 2025-02-01 open)

Julia

コードを以下のリンクに示す。

2.3.jl

history

revised on 2005-3-5 rev.3, 2005-8-28 rev.4,2009-08-09 rev.5,
2014-02-09 Fortran code added, hand calculation removed.
2015-03-28 Python 3 code added.
2016-02-06 Javascript code added.
2016-09-28 Fortran, Gauche, Javascript codes linked.
2016-11-01 Hand calculation returned, Python 3 code linked.
2018-01-03 XHTML1.0 changed to HTML5.
2018-06-03 charset shift-jis to utf-8.
2019-09-19 Fortran code revised.
2021-02-14 move history.
2024-08-28 revise 2.3.js
2024-10-26 add 2.3.jl
2025-02-01 open revised 2.3.js