Re: Solving on mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg88531] Re: Solving on mathematica*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 7 May 2008 07:10:37 -0400 (EDT)*Organization*: Uni Leipzig*References*: <fvpctc$mkh$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, and where is the dependence on "i" ? Or do you think that the symbol Xi depend on i like "Chris" depend on s ?? And NSolve[] is for the case where you have numerical values. And to find the variables U, V, W, B you need 4 (four) equations and not only a single one, otherwise you may have an infinite number of equations and the print out of all the solutions would take a bit longer. Regards Jens Chris wrote: > How would i go about solving this equaiton on mathematica > > (Xi -Ux)^2 + (Yi - Uy)^2 + (Zi - Uz) = (Ri - Cb) > i = 1,2,3,4 > > where we need to find Ux, Uy, Uz, Cb tried a few things and they dont work. > > NSolve[ (Xi - U)^2 + (Yi - V)^2 + (Zi - W)^2 == (Ri - B)^2, {U, V, W, > B}, { i = 1, 2, 3, 4} ] > > any ideas? >