       Re: Solving on mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg88519] Re: Solving on mathematica
• From: dh <dh at metrohm.ch>
• Date: Wed, 7 May 2008 07:08:25 -0400 (EDT)
• References: <fvpctc\$mkh\$1@smc.vnet.net>

Hi Chris,

there is not enough information in your equations to distinguish Uz from

Cb. In your equation they appear always as Uz-Cb. Therefore, either

your equations are wrong or you need to replace the 2 independent

variables Uz and Cb by a single variable and reduce the number of

equations to 3.

hope this helps, Daniel

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?

>

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