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Solving the TVM equation for the interest rate
04-17-2018, 08:59 AM (This post was last modified: 04-17-2018 12:29 PM by Gamo.)
Post: #12
RE: Solving the TVM equation for the interest rate
In the HP-11C Solutions Handbook got one program to solve for Interest given [n] [PMT] [PV]
This show the Formula and Initial guess used as well.

Take a look at the attached file.
Is this a better initial guess?

Using the example problem from Carsen I put program from 11C Solutions Handbook to HP-15C official HP emulator for Android and here the result.

Problem #2: n=36 PV=13,000 PMT=-372.53 FV=0 i=???
Answers: 12C=0.1692576094% 15C=0.1692569782% Prime=0.169257604168%
*From 11C handbook program: 0.1692572638%

Problem #3: n=36 PV=5,750 PMT=-176.89 FV=0 i=???
Answers: 12C=0.56266017270% 15C=0.5626013555% Prime=0.562601726101%
*From 11C handbook program: 0.5626017349%

Problem #4: n=360 PV=75,000 PMT=-425.84 FV-0 i=???
Answers: 12C=0.4583302324% 15C=0.4583302039% Prime=0.458330232637%
*From 11C handbook program: 0.4583302172%

Gamo


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RE: Solving the TVM equation for the interest rate - Gamo - 04-17-2018 08:59 AM



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