[comp.sys.handhelds] How to solve simultaneous eqns on HP48sx?

sunyat@aix01.aix.rpi.edu (Eric Hsiao) (04/05/91)

Hi, I was wondering if there's an easy way to enter in two or more
equations and have the HP solve for them simultaneously.  These equations
are not the simple 3x + 4y.....= 3 type equations.  They're more like

  1       -T/rt
 --- = c e
  x 
(Arrehnious)..and I don't really know how to stick that into a matrix.
Is there a way to just type in 2 equations with two unknowns in the
eqn writer (or directly) and press a solve key and it'll solve for the
two unknowns?  I know Eureka, by Borland, for the IBM can do this.

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sburke@jarthur.Claremont.EDU (Scott Burke) (04/05/91)

To solve that simple a set of simultaneous equations, use ISOL to isolate
the variable you desire, then EQ\-> to blow up the result, and store that
into the variable, then EVAL to evaluate the 2nd equation.

Scott.

TDSTRONG%MTUS5.BITNET@VM1.NoDak.EDU (* PF03 UNDEFINED) (04/07/91)

>
>Hi, I was wondering if there's an easy way to enter in two or more
>equations and have the HP solve for them simultaneously.  These equations
>are not the simple 3x + 4y.....= 3 type equations.  They're more like
>
>  1       -T/rt
> --- = c e
>  x
>(Arrehnious)..and I don't really know how to stick that into a matrix.
>Is there a way to just type in 2 equations with two unknowns in the
>eqn writer (or directly) and press a solve key and it'll solve for the
>two unknowns?  I know Eureka, by Borland, for the IBM can do this.
>

A program for solving nonlinear multple equaitons is available on
Wayne's mail server.  It is very useful solving almost any system.

The program is on the math directory with the name MULT.EQ.SOLVER or
something like that.

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  I__)  _   _I  _   _   TIM STRONG <TDSTRONG%MTUS5.BITNET@CUNYVM.EDU>
  I  \ (_I (_I (_I I    MICHIGAN TECH.    HOUGHTON, MICHIGAN

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akcs.wiser1@hpcvbbs.UUCP (steven lee wiser) (04/10/91)

Dear Radar:
See message 2508 for an HP-48sx program to do this
Steve Wiser