Equation solvers, HP 41CV etc.

[Thomas Okken]

(12-03-2017 04:15 AM)rprosperi Wrote:  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.

The HP-25 Applications Programs book also includes a numerical solver, based on Newton's method. The program takes up 35 lines, leaving only 14 for the function, but still, pretty neat!