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

[avsebastian]

Hi guys.

Do you know, if there are a command for to solve Abs Value Ineq ?

[avsebastian]

(10-19-2024 05:57 PM)avsebastian Wrote:  Hi guys.

Do you know, if there are a command for to solve Abs Value Ineq ?

i have two hp 50g (rom 2.15 and rom 2.10)

with rom 2.15 RPN or algebraic , the problem ABS(X-2)>3
apply SOLVEVX
Show me : " parameters not allowed

with rom 2.10 RPN or algebraic, the problem ABS(X-2)>3


apply SOLVEVX
Show me : "X< -3 -2 OR X> 3-2

I don't get the same result with the ROM 2.15 ??

EDITS: For a difficult exercise as:

ABS (7x - 2x^2) >ABS (4X-3)
and then SOLVEVX

both roms show me: "not reducible to rational expression"

[Gilles]

(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"

[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