F' on hp 15c le - Printable Version +- HP Forums ( https://www.hpmuseum.org/forum)+-- Forum: HP Calculators (and very old HP Computers) ( /forum-3.html)+--- Forum: General Forum ( /forum-4.html)+--- Thread: F' on hp 15c le ( /thread-5863.html) |

F' on hp 15c le - lrdheat - 03-12-2016 11:13 PM
Can't remember program using complex capability of hp 15c le to solve f'x = 0 in order to find a max/min of f'x. This was from several years ago...somebody contributed a real neat short elegant program! f(x) is defined in program 0, f'(x)would be in program 1, dx in register .0, "x" result in program 1 would be plugged into program 0 to find f(X) at that point. RE: F' on hp 15c le - Gerson W. Barbosa - 03-12-2016 11:35 PM
This one, perhaps? http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv021.cgi?read=243867 RE: F' on hp 15c le - Marcio - 03-12-2016 11:42 PM
That's pure awesomeness. Thanks for posting. RE: F' on hp 15c le - lrdheat - 03-13-2016 12:26 AM
That's the one! I'm glad that the post included my struggle to understand the problem with using change sign with complex numbers as well...would have forgotten that! RE: F' on hp 15c le - Ángel Martin - 03-13-2016 07:28 AM
(03-13-2016 12:26 AM)lrdheat Wrote: That's the one! It seems it's time to dust off the 41Z... more to come. |