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While working on some probability calculations using "solve" on an HP-27S, I was curious why an iterative solution was used while using logs would be faster? The equation was simply something like this:


Where I wanted to solve for Z. It chugged away displaying intermediate solutions while working it out. Why not simply..


I haven't tried it on my HP-48 yet. Would it resort to an iterative solution as well? What about TVM applications for solving for the number of periods? Iterative solutions? I haven't looked yet, but curious (and too late to investigate tonight)..

Because the 27S only solves equations numerically. It doesn't have any symbolic algebra code. It's only a slightly fancier version of the 34C/15C/Advantage solver.

(12-12-2023 06:43 AM)brouhaha Wrote: [ -> ]Because the 27S only solves equations numerically. It doesn't have any symbolic algebra code. It's only a slightly fancier version of the 34C/15C/Advantage solver.

It can do a little bit of rearrangement to solve directly, but nothing fancy like applying logs!