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- Newsgroups: sci.math
- Path: sparky!uunet!usc!rpi!usenet.coe.montana.edu!nntp.uoregon.edu!cie.uoregon.edu!scavo
- From: scavo@cie.uoregon.edu (Tom Scavo)
- Subject: Re: Math Gods & lower Saints
- Message-ID: <1992Aug23.185113.23381@nntp.uoregon.edu>
- Sender: news@nntp.uoregon.edu
- Organization: University of Oregon Campus Information Exchange
- References: <1992Aug22.080051.15169@ecst.csuchico.edu>
- Distribution: usa
- Date: Sun, 23 Aug 92 18:51:13 GMT
- Lines: 18
-
- In article <1992Aug22.080051.15169@ecst.csuchico.edu> madams@ecst.csuchico.edu (Michael E. Adams) writes:
- >
- >Question: given Monthly_Payment, Length_of_loan (in months), and the
- > Principal, what is the interest rate (compounded monthly)?
-
- The solution may be obtained by iterating the formula
-
- f(r) = 12p/A (1 - (1 + r/12)^(-12n))
-
- where p is the monthly payment, A is the amount of the loan,
- n is the number of years, and r is the unknown interest rate.
- This problem is discussed in J. Mathews and S.T. Tan (_Math Mag_
- 63(4), 263--269, Oct 1990).
-
- --
- Tom Scavo
- scavo@cie.uoregon.edu
- scavo@inferno.uoregon.edu
-