Hp 50g - Absolute Value Inequalities. How to solve it?

[avsebastian]

(10-20-2024 08:16 AM)Gilles Wrote:  

(10-20-2024 02:08 AM)avsebastian Wrote:  with rom 2.15 RPN or algebraic , the problem ABS(X-2)>3
apply SOLVEVX
Show me : " parameters not allowed

Hi,
Change system flag 123 to "Allow switch mode".
I get X<-1 or X>5
Verify the flag 106 "Siplification in series"

1) In ROM 2.10 , i did that. But, only when activate " approx in CAS MENU, work. In ROM 2.15 don' t work

2) a complicated inequality as: Abs (x+1) + × >1 + Abs(x^2), was not solved either in rom 2.10 or in rom 2.15 EXCEPT......

3) when Erase files on CASDIR Directory, it solved , but only in rom 2.15

4) I must always erase files in CASDIR, otherwise, the calculator is not able to solve it.

strange, isn't it?

Thanks Giles