Polynomial Root Finding on the 12C

[Les Wright]

Does anyone recall seeing in recent months an entry or a link to something (maybe from Gerson or Valentin) discussing how one can use the 12c's NPV/IRR computing capabilities and CF registers to find a real root of a polynomial?

I have been wracking my brain trying to figure how it is done but I can seem to trick the HP12Cp into finding the root I want. Keeping getting Error 3 or Error 7.

Any ideas?

Les

[Gerson W. Barbosa]

Hello Les,

I think you mean Valentin Albillo's HP-12C Serendipitous Solver.

Regards,

Gerson.

[Paul Dale]

Try Valentin's article:

http://membres.lycos.fr/albillo/calc/pdf/DatafileVA005.pdf

- Pauli

[Les Wright]

That's the one!

Ingenious, even if you do have to trick it into finding a positive root.

FWIW, the timings on the 12Cp are several times faster than that quoted for the 12C. The cheap kinpo thing is good for something!

Les

[Valentin Albillo]

Best regards from V.