Condition on equation

01112019, 02:14 PM
Post: #1




Condition on equation
Hi! I've just received my new HP Prime (latest model) and am very excited. I'm also new to this forum. But I'm not new to HP calculators, I have a HP 48 and a HP50g.
Anyway, fiddling around with it, I was wondering whether there is a way to specify a condition on a formula in CAS mode. For example, if I want to add the condition x<1 before solving for x. Is that possible? 

01112019, 02:55 PM
Post: #2




RE: Condition on equation
With assume( ) and additionally( ) you can perform those actions
Viga C  TD  FB 

01112019, 03:23 PM
Post: #3




RE: Condition on equation
Hi!, EricR :
Try with CASE, per example ... CASE IF A<0 THEN RETURN "negative"; END; IF 0≤A≤1 THEN RETURN "small"; END; DEFAULT RETURN "large"; END; See, from User Guide ... http://h10032.www1.hp.com/ctg/Manual/c05332710 

01112019, 05:05 PM
Post: #4




RE: Condition on equation
Thanks a lot! assume() was what I was looking for. I've got to study the manual...


01122019, 04:12 PM
(This post was last modified: 01122019 04:40 PM by informach.)
Post: #5




RE: Condition on equation
Hi!, EricR :
You can use too ... IFTE Check, with ... https://en.hpprime.club/docs/reference/IFTE https://en.hpprime.club/articles/primet...repart2/ 

01162019, 01:46 PM
Post: #6




RE: Condition on equation
How you would cancel an assume/additionally?


01162019, 02:26 PM
Post: #7




RE: Condition on equation
purge()
Viga C  TD  FB 

01162019, 02:26 PM
Post: #8




RE: Condition on equation
As far as I know the only way is "purge(var)".
Arno 

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