Re: HP Prime: Integrate Won't Integrate Message #14 Posted by CR Haeger on 15 Nov 2013, 1:09 p.m., in response to message #11 by Brock
Quote:
I have been trying to do the examples in the manual, which work on the emulator, but not on my calculator. For example, when I perform int(1/x) I get inf on the calculator, but ln(abs(x)) on the emulator. Also, when I try to find roots, all I get is [[]] on the calculator. I have tried these remedies you have prescribed but to no avail. What do you recommend?
Thank you.
Hello  I've screwed this up in past too.
I think you may have stored 0 into x while in CAS mode (a CAS variable). If so, you'll see it in Vars/CAS. To delete this CAS variable, you can type purge(x) ENTER or use Toolbox/Catalog/Purge()  both are a pain but will delete only the x value. If you Shift/ESC (Clear) while in CAS this will erase ALL the CAS variables. I ended up setting a USER key for purge()...
After that, you may want to ensure you have CAS set to Exact using Shift/CAS (Settings). Otherwise you may get "bad argument value" if you plan to look for symbolic (exact) output.
Now, int(1/x) should give you LN(x). diff(x^2) should give 2*x and int(x^2) should give 1/3 * x^3
Roots or zeros()should also work.
Best,
Carl
Edited: 15 Nov 2013, 1:13 p.m.
