Re: Coefficient...

*To*: mathgroup at smc.vnet.net*Subject*: [mg79674] Re: Coefficient...*From*: Adriano Pascoletti <adriano.pascoletti at gmail.com>*Date*: Wed, 1 Aug 2007 05:11:50 -0400 (EDT)*References*: <f8n1i0$j87$1@smc.vnet.net>

On Jul 31, 12:05 pm, "Bruno Campanini" <B... at gmail.com> wrote: > Given fx:=ax^2 + dxy + 2cx + bcxz > Coefficient[fx,x] gives dy + 2c + bcz but I only need 2c. > > Without any If clause, is it possible to get Coefficient not > to look on terms containing y or z? > > Bruno Probably the most natural solution is to evaluate your result at y=0 and z=0: In[17]:= Coefficient[fx, x] /. {y -> 0, z -> 0} Out[17]= 2*c Adriano Pascoletti