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+--- Thread: Problem with zeros, solve in CAS. (/thread-303.html)
Problem with zeros, solve in CAS. - John P - 01-01-2014 10:59 PM
When on HP Prime in CAS finding zeros or solving with solve for example x^2-100 I get only one solution 10 but it should be [-10,10] or {-10,10} or maybe I have to change something i setting. In Home view it seams to work OK.
Happy New Year 2014.
Thanks.
RE: Problem with zeros, solve in CAS. - Michael de Estrada - 01-02-2014 02:15 AM
(01-01-2014 10:59 PM)John P Wrote: When on HP Prime in CAS finding zeros or solving with solve for example x^2-100 I get only one solution 10 but it should be [-10,10] or {-10,10} or maybe I have to change something i setting. In Home view it seams to work OK.
Happy New Year 2014.
Thanks.
Please provide more details, such as the exact syntax you are using and your CAS settings. I don't have any problem getting the correct result on my Prime.
RE: Problem with zeros, solve in CAS. - John P - 01-02-2014 04:07 AM
(01-02-2014 02:15 AM)Michael de Estrada Wrote:(01-01-2014 10:59 PM)John P Wrote: When on HP Prime in CAS finding zeros or solving with solve for example x^2-100 I get only one solution 10 but it should be [-10,10] or {-10,10} or maybe I have to change something i setting. In Home view it seams to work OK.
Happy New Year 2014.
Thanks.
Please provide more details, such as the exact syntax you are using and your CAS settings. I don't have any problem getting the correct result on my Prime.
Here is the syntax:
solve(x^2-100=0,x) -> {-10}
zeros(x^2-100,x) -> [-10]
P.S. In the latest emulator I do not have this problem solve and zeroes return {-10,10}, [-10,10].
Settings in CAS:
Angle Measure: Radians
Number Format: Standard, 4
Integers: Decimal
Simplify: Minimum
Exact: v
Use -v: v
Principal: v
Recursive Eval. 5
Rec. Repl. 1
Rec. Fn. 9
Epsilon: .000000000001
Prob. 1E-15
Newton 40
RE: Problem with zeros, solve in CAS. - Michael de Estrada - 01-02-2014 04:36 AM
I don't see anything wrong, and my Prime gives the correct answer with your syntax. You didn't show your CAS settings for Complex, Use i and Increasing, however, those shouldn't affect your results.
Do you have the latest firmware (2013 11 25 (5447)) on your Prime ? Have you tried a hard reset using the pinhole at the rear of the calculator ?
RE: Problem with zeros, solve in CAS. - John P - 01-02-2014 05:16 AM
(01-02-2014 04:36 AM)Michael de Estrada Wrote: I don't see anything wrong, and my Prime gives the correct answer with your syntax. You didn't show your CAS settings for Complex, Use i and Increasing, however, those shouldn't affect your results.
Do you have the latest firmware (2013 11 25 (5447)) on your Prime ? Have you tried a hard reset using the pinhole at the rear of the calculator ?
Yes, I do have the latest firmware. I was looking how to flash the memory and put the latest firmware again and accidentally I fixed the problem by pressing together the:
On+Apps+Esc for very short time and releasing them together. It seams to be working OK for now and I hope it stays like that.
Thanks Michael.