Equation solvers, HP 41CV etc.

[rprosperi]

(12-03-2017 03:31 AM)Trond Wrote:  I just realized that HP 41CV (which I just ordered, and still waiting for) does not have an equation solver. Eeep! OK no worries, I think I found a simple program for it here, but people also talk about a module for this. Which module would that be, and is it otherwise recommended? I am fine with with either 32SII (entering equations more or less as they look on paper) or 42S style (entering equation in RPN =0 ). I am guessing the latter would be the 41C way of doing it.

Bonus question: which HP calculators from the 70s have equation solvers? Looks like 34C has, but does HP 65/67 have this?

If you're looking for HP-made ROMs, both the Math Pac and Advantage Pac include solvers; the Advantage Pac offers much more as it was introduced much later and includes matrix functions from the CCD ROM, and Solver and Integration programs (originally 15C versions) from another 3rd party.

If you will consider getting a 41CL upgrade or a NoVRAM module, you can load some of Angel's recent 41 Modules (made in the last 5-10 years) which offer much more powerful and flexible capabilities.

Bonus Answer: From the 70's, only the 34C has a solver built-in. It was the first (HP for sure, maybe all?) calculator to offer this feature. There were programs published for the '67/'97, 29C and likely the '65 as well.