[Maxima] Another integral not calculated

[Richard Fateman]

Try log(x)  instead of ln(x). Then it works.

RJF
 

> -----Original Message-----
> From: maxima-bounces at math.utexas.edu 
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of Krzysztof Lesniak
> Sent: Sunday, June 15, 2008 3:08 AM
> To: maxima at math.utexas.edu
> Subject: [Maxima] Another integral not calculated
> 
> It seems that the problem of automatic integration of typical 
> functions 
> is raised very often. Here is another integral (sorry if  I  have 
> missed  some older posts):
> 
> (%i1) integrate(ln(x)/x^3, x);
> (%i2) integrate(ln(x)/x^3, x, 1, %e);
> 
> Substitution t = ln(x) leads to readily evaluated integrals:
> 
> (%i3) integrate(t*exp(-2*t), t);
> (%o3) -((2*t+1)*%e^(-2*t))/4
> (%i4) integrate(t*exp(-2*t), t, 0, 1);
> (%o4) 1/4-(3*%e^(-2))/4
>  
> Probably someone eager for integration who knows lisp will finally 
> update the .mac files. Unfortunately I don't know lisp :(
> Best regards, Krzysztof Leśniak
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