WP 34S Solver

[Marcio]

(05-28-2015 11:58 AM)Dieter Wrote:  The 34s solver requires two initial guesses that should bracket the root. You enter them in X and Y (gueses1 [ENTER] guess2 [SLV] ...). This and more details can be found in the manual.
Interesting. However, I was able to find one root that was not bracketed, it was a bit close though, and they (the bounds) wouldn't work if pushed a little further.

(05-28-2015 04:19 AM)AnalogJoe Wrote:  I have mixed feelings about these type of HP numeric solvers, on one hand they are extremely painful when it comes to solving polynomials because they will only find one particular root, and you have to constantly change your initial guess in order to find the different roots, at this point it is useful to remember Descartes rule of signs to get a better idea of what you should be looking for.

Especially for solving polynomials, both with real and complex coefficients, dedicated programs exists that will do the job. For instance, the 34s emulator comes with polyroot.wp34s.

If these programs are so wanted by the community, why not include them in the firmware? Just a thought.