Re: Simple question: is it possible to take a derivative and solve for x ?
- To: mathgroup at smc.vnet.net
- Subject: [mg119323] Re: Simple question: is it possible to take a derivative and solve for x ?
- From: Tomas Garza <tgarza10 at msn.com>
- Date: Mon, 30 May 2011 06:36:34 -0400 (EDT)
I think you have too many unknown symbols, like v1, V1, l1, L1, C,... (by the way, C is a Mathematica symbol - don't use capital letters in your own symbols). Do they have a specific meaning? -Tomas > Date: Sun, 29 May 2011 07:36:37 -0400 > From: t27026t at yahoo.com.br > Subject: [mg119289] Simple question: is it possible to take a derivative and solve for x ? > To: mathgroup at smc.vnet.net > > I am a beginner, and would like to know if it is possible to solve for x the first derivative of a long equation in Mathematica. Bear with me, my background is in Biomedical Sciences. > > I am typing the following command: > > Solve[D[((x*l1 + (1 - x)*l2)/((x^2*v1 + (1 - x)^2*v2 + 2*x*(1 - x)*c)^0.5))+((x*L1 + (1 - x)*L2)/((x^2*V1 + (1 - x)^2*V2 + 2*x*(1 - x)*C)^0.5)), x]==0,x] > > But Mathematica 8 simply stops, and no output is given. > > Any tips? > > Cheers! > > Alonso >