Integral on HP 42S - 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: Integral on HP 42S ( /thread-10594.html) |

Integral on HP 42S - lrdheat - 04-26-2018 08:10 PM
Just received an HP 42S. What a beautiful calculator! If I want to integrate a function such as 5th root of x from -2 to 0, is there a way to do so? On the HP 35S, the x root y command is available for this. Is there a work around on the HP 42S? (Of course, there is no problem with x>0!) RE: Integral on HP 42S - Dieter - 04-26-2018 08:58 PM
(04-26-2018 08:10 PM)lrdheat Wrote: If I want to integrate a function such as 5th root of x from -2 to 0, is there a way to do so? On the HP 35S, the x root y command is available for this. Is there a work around on the HP 42S? (Of course, there is no problem with x>0!) What about this way: Code: `LBL"FX"` The true result is –5/6 · 2 ^{6/5}.Dieter RE: Integral on HP 42S - lrdheat - 04-26-2018 11:28 PM
Outstanding! Tried it on a mixed case that covers negative and positive results on 1/(5 root(x-1)) from 0 to 33. With accuracy of .001, it takes a while, but comes up with 18.73 on fix 2, close to actual value of 18.75 Works faster dividing into 2 integrals, one from 0 to 1, then from 1 to 33. Thanks! |