MathGroup Archive 2001

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Re: Equation

  • To: mathgroup at
  • Subject: [mg26654] Re: Equation
  • From: Lawrence Walker <lwalker701 at>
  • Date: Sat, 13 Jan 2001 22:36:25 -0500 (EST)
  • Organization: Morgan State University: COMSARE
  • References: <93kn7o$>
  • Sender: owner-wri-mathgroup at

I would use either of the following:

where, equ = i == R - R((1 + .05)^10-1)/((1 + R)^10-1);

1.  Solve[equ,R]
2.  FindRoot[Evaluate[equ /. i -> 1], {R, .1}]

Note that '1' gives a solution with Root in it implying that the
solution can have multiple roots.  '2' only finds a solution if you
provide what is 'i' should be and where R should start.  In this case
'i' was set to 1 and R is initially set to be 0.1 .


Jose Lasso wrote:

> Hi,
> I have little experience with Mathematica, I change to Mathematica
> few months ago, I want to solve: i = R - R((1 + .05)^10-1)/((1 +
> R)^10-1) for R, how can I do this task in Mathematica??. Thx in
> advance. Regards.
> Jose M Lasso
> PS:Happy new year!!


     (\___/)     The fear of the LORD is the beginning of
     (o\ /o)     wisdom: a good understanding have all they
    /|:.V.:|\    that do his commandments: his praise
    \\::::://    endureth for ever.              Psa 111:10
-----`"" ""`------------------------------------------------
        Lawrence A. Walker Jr., M.Eng./Ph.D. Candidate
                   Morgan State University
          Clarence M. Mitchell School of Engineering
 COMSARE (Center Of Microwave/Satellite And RF Engineering)

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