dropping higher order terms

*To*: mathgroup at smc.vnet.net*Subject*: [mg32596] dropping higher order terms*From*: Chad Junkermeier <cej38 at email.byu.edu>*Date*: Thu, 31 Jan 2002 01:45:19 -0500 (EST)*Organization*: Utah State University*Sender*: owner-wri-mathgroup at wolfram.com

I have a problem where I have a function of the form f(x) = (a0 x^0 + a1 x^1 +a2 x^2 + ...+ aN x^N) * g(x) I would like to be able to get rid of the higher order terms without altering the form of g(x). Resulting in: f(x) = (a0 x^0 + a1 x^1 +a2 x^2) * g(x) I tried the following: Series[f(x)/g(x),{x,0,2}] * g(x) But this gives the wrong answer. How can I do this? Chad Junkermeier Department of Physics and Astronomy Brigham Young University email: junkermeier at byu.edu phone: 801-368-3529