Integral on HP 42S

04262018, 08:10 PM
Post: #1




Integral on HP 42S
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!) 

04262018, 08:58 PM
(This post was last modified: 04262018 08:59 PM by Dieter.)
Post: #2




RE: Integral on HP 42S
(04262018 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 

04262018, 11:28 PM
Post: #3




RE: Integral on HP 42S
Outstanding! Tried it on a mixed case that covers negative and positive results on 1/(5 root(x1)) 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! 

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