Prime function app question - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Prime function app question (/thread-18744.html) Prime function app question - Coacht95 - 09-02-2022 01:02 AM On the prime, in the function app I leave F1-F3 open. I have F4 set to be the first derivative of F1, and F5 to be the 2nd derivative. I want F6 to be the integral of F1, but I can’t figure that out yet. Everything I have tried gives me an error. Any suggestions? RE: Prime function app question - robmio - 09-02-2022 05:37 AM (09-02-2022 01:02 AM)Coacht95 Wrote:  On the prime, in the function app I leave F1-F3 open. I have F4 set to be the first derivative of F1, and F5 to be the 2nd derivative. I want F6 to be the integral of F1, but I can’t figure that out yet. Everything I have tried gives me an error. Any suggestions? You must use capital letters and the CAS () statement. RE: Prime function app question - C.Ret - 09-02-2022 04:48 PM (09-02-2022 01:02 AM)Coacht95 Wrote:  Any suggestions? You may have made a syntax error somewhere. Using the same F1(X)=2*X-X²/15 as robmio, I directly (without any CAS extension) get the integral, first and second derivative function without any issue : [attachment=11055] RE: Prime function app question - robmio - 09-03-2022 03:25 PM (09-02-2022 04:48 PM)C.Ret Wrote:   (09-02-2022 01:02 AM)Coacht95 Wrote:  Any suggestions? You may have made a syntax error somewhere. Using the same F1(X)=2*X-X²/15 as robmio, I directly (without any CAS extension) get the integral, first and second derivative function without any issue : Thanks for the suggestion. I thought I had to use the CAS instruction, being an itegral, but no. Sincerely, robmio (Roberto Mioni)