Using Coefficient on an equation
- To: mathgroup at smc.vnet.net
- Subject: [mg95433] Using Coefficient on an equation
- From: carlos at colorado.edu
- Date: Sun, 18 Jan 2009 05:33:11 -0500 (EST)
If f=a*x^2+b*x+c, Coefficient[f,x^2] obviously returns a. But if f=a*x^2+b*x+c==0, it returns 0. The problem arose using the Calculus`VariationalMethods` package. It (unfortunately) returns the Euler-Lagrange equations as such, so I have to remove the useless ==0 appendage for Coefficient to work properly. Is there a simple direct way out?