[Newbie] expansion of a function as a power series
Subject: [Newbie] expansion of a function as a power series
From: Edwin Woollett
Date: Wed, 25 Jul 2007 11:04:09 -0700
use coeff() function:
(%i1) f(x) := x/(1-x-x^2);
x
(%o1) f(x) := ----------
2
1 - x - x
(%i2) T: taylor( f(x), x, 0, 5 );
2 3 4 5
(%o2)/T/ x + x + 2 x + 3 x + 5 x + . . .
(%i3) coeff(T,x,3);
(%o3)/R/ 2
ted woollett
------------------
Hugo Coolens <coolens at kahosl.be> wrote:
> Can anyone tell me how to "harvest" the coefficient of x^n in the
> expansion of the function x/(1-x-x?^2) as a ower series around the
> origin?
>
> regards,
> hugo
>