Integration Issues

10022017, 05:41 AM
Post: #1




Integration Issues
I just purchased my first HP calculator. I thought I'd test out a few integrals, but I kept getting the incorrect answer when I input the expression shown in the photo linked below. Am I formatting something improperly?
https://imgur.com/gallery/Jdv8T 

10022017, 03:46 PM
Post: #2




RE: Integration Issues
You should post the input and the output instead of a picture. Why do you believe there is an issue?


10022017, 04:11 PM
Post: #3




RE: Integration Issues
(10022017 03:46 PM)parisse Wrote: You should post the input and the output instead of a picture. Why do you believe there is an issue? Sorry I’ll do that next time. Were you able to view the input and output through the link? When I did the problem by hand I got (3x^(4/3))/4 + (x^2)/2. Checked Wolfram Alpha and got the same result as when I did it by hand. I realize the latter portion of that result given from the HP is correct, but the first portion is what is confusing me. Why did it leave the ^3sqrt(x) in the answer? 

10022017, 06:58 PM
Post: #4




RE: Integration Issues
Why not? It's correct as well...


10022017, 07:10 PM
Post: #5




RE: Integration Issues
Ok I see what it did. Basically split it into x^1 and x^(1/3). So same thing as what I got manually. Thanks


10032017, 01:22 AM
Post: #6




RE: Integration Issues
So since we are on this, what command would you use to combine the roots into 4/3?
TW Although I work for the HP calculator group, the views and opinions I post here are my own. 

10032017, 01:55 AM
Post: #7




RE: Integration Issues
(10032017 01:22 AM)Tim Wessman Wrote: So since we are on this, what command would you use to combine the roots into 4/3? To be honest I have no idea. Even doing x^(1/3)*x^(3/3) won’t yield x^(4/3). You instead get x*x^(1/3). Maybe there is a setting that allows solutions to have improper fraction powers? Although I haven’t seen such a setting. 

10032017, 06:11 AM
Post: #8




RE: Integration Issues
You can't rewrite as x^(4/3) because fractional powers are rewritten as x^integer_part*(x^(1/d))^n with n<d.


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