-----maxima-bounces at math.utexas.edu wrote: -----
>Thanks, Barton. I did not know Taylor series at infinity, although I
>do know Taylor series at finite points. Could you please tell me where
>I can learn about Taylor series at infinity?
Compare (%o3) to (%o4):
(%i1) f(x) := sqrt(1+x^2) - x$
(%i2) taylor(f(x),x,inf,5);
(%o2) 1/(2*x)-1/(8*x^3)+1/(16*x^5)+...
(%i3) taylor(f(1/x),x,0,5);
(%o3) x/2-x^3/8+x^5/16+...
(%i4) subst(1/x,x,%);
(%o4) 1/(2*x)-1/(8*x^3)+1/(16*x^5)
BW