[Maxima] a financial problem again
villate at fe.up.pt
Tue Mar 27 10:35:40 CDT 2012
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
(%i2) logexpand: all$
(%i3) solve ( log(7650*1.037^x=12250), x);
(%o3) [x = (193246*log(12250)-193246*log(7650))/7021]
(%o4) [x = 12.9588573703922]
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