[Maxima] a financial problem again

Henry Baker hbaker1 at pipeline.com
Tue Mar 27 10:45:51 CDT 2012

Suggestion for the Maxima manual:

Instead of only specifying what the default is, how about specifying all of the possible values for logexpand?  e.g.,

Default value: false

Possible values: {false,true,all,super}

Or give "possible values", where the first value given is the default value.

At 08:35 AM 3/27/2012, Jaime Villate wrote:
>On 03/27/2012 04:13 PM, Victor Hermans wrote:
>>Maxima cannot solve this relatively simple problem. Why?
>>A principal of USD 7650 is invested at a rate of 3.7% compounded annually.
>>After how many years will the investment exceed USD 12250?
>some developers with more experience than me will tell you why Maxima has been built that way.
>In the meantime, you can give "solve" a little help to get the answer you want:
>(%i2) logexpand: all$
>(%i3) solve ( log(7650*1.037^x=12250), x);
>(%o3) [x = (193246*log(12250)-193246*log(7650))/7021]
>(%i4) float(%);
>(%o4) [x = 12.9588573703922]

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