07-09-2017, 10:12 AM
Post: #1
 COB160 Junior Member Posts: 35 Joined: Jul 2017
In CAS mode if I type
(1-e^(-1/2))/(1-e^-2)
the result is
(e^(1/2))^3/((e^(1/2))^3+(e^(1/2))^2+(e^(1/2))+1)
wich is 0.174326466693

In home mode if I type the same
(1-e^(-1/2))/(1-e^-2)
the result is
0.455054233923 that is the result I was looking for.

How can this be possible?
07-09-2017, 10:39 AM
Post: #2
 toml_12953 Senior Member Posts: 2,060 Joined: Dec 2013
RE: Contradiction between CAS and Home
(07-09-2017 10:12 AM)COB160 Wrote:  In CAS mode if I type
(1-e^(-1/2))/(1-e^-2)
the result is
(e^(1/2))^3/((e^(1/2))^3+(e^(1/2))^2+(e^(1/2))+1)
wich is 0.174326466693

In home mode if I type the same
(1-e^(-1/2))/(1-e^-2)
the result is
0.455054233923 that is the result I was looking for.

How can this be possible?

I get 0.455... in both modes.

Tom L
Cui bono?
07-09-2017, 10:46 AM
Post: #3
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-09-2017 10:39 AM)toml_12953 Wrote:
(07-09-2017 10:12 AM)COB160 Wrote:  In CAS mode if I type
(1-e^(-1/2))/(1-e^-2)
the result is
(e^(1/2))^3/((e^(1/2))^3+(e^(1/2))^2+(e^(1/2))+1)
wich is 0.174326466693

In home mode if I type the same
(1-e^(-1/2))/(1-e^-2)
the result is
0.455054233923 that is the result I was looking for.

How can this be possible?

I get 0.455... in both modes.

Type (1-e^(-1/2))/(1-e^-2) in CAS mode click enter and u will get (e^(1/2))^3/((e^(1/2))^3+(e^(1/2))^2+(e^(1/2))+1), then go to home-menu-get from CAS-enter to obtain the numerical value of the result
07-09-2017, 12:41 PM
Post: #4
 DrD Senior Member Posts: 1,133 Joined: Feb 2014
RE: Contradiction between CAS and Home
If the expression is entered in CAS , then use [Shift][Enter], the approximate value returned shows up with the same value as returned when entered in HOME, (on my emulator).
07-09-2017, 12:52 PM
Post: #5
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-09-2017 12:41 PM)DrD Wrote:  If the expression is entered in CAS , then use [Shift][Enter], the approximate value returned shows up with the same value as returned when entered in HOME, (on my emulator).

It is correct, but why when I import the same formula in home mode, it changes the result?
07-10-2017, 07:00 AM
Post: #6
 Freire Junior Member Posts: 33 Joined: Apr 2017
RE: Contradiction between CAS and Home
I was not able to reproduce the error either. All I get is 0.455054233923 every way I try.
07-10-2017, 12:42 PM
Post: #7
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-10-2017 07:00 AM)Freire Wrote:  I was not able to reproduce the error either. All I get is 0.455054233923 every way I try.

Could my calculator be damaged?
07-10-2017, 06:10 PM
Post: #8
 Joe Horn Senior Member Posts: 1,992 Joined: Dec 2013
RE: Contradiction between CAS and Home
COB160: What firmware version are you using?

<0|ɸ|0>
-Joe-
07-10-2017, 08:05 PM
Post: #9
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-10-2017 06:10 PM)Joe Horn Wrote:  COB160: What firmware version are you using?

I don know, I never update the calculator since i bought it! Another strange things I noticed is that there are lines that seem interferences when I tap th screen with the finger
07-10-2017, 09:51 PM
Post: #10
 webmasterpdx Senior Member Posts: 541 Joined: Sep 2015
RE: Contradiction between CAS and Home
07-10-2017, 10:22 PM
Post: #11
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-10-2017 09:51 PM)webmasterpdx Wrote:  update your firmware

I am Mac OS user, is it possible to do it anyway?
07-10-2017, 11:52 PM
Post: #12
 Joe Horn Senior Member Posts: 1,992 Joined: Dec 2013
RE: Contradiction between CAS and Home
(07-10-2017 08:05 PM)COB160 Wrote:
(07-10-2017 06:10 PM)Joe Horn Wrote:  COB160: What firmware version are you using?
I don know

Press Home, Help, Tree (soft key), up-cursor, Enter. What "Software Version" is shown?

<0|ɸ|0>
-Joe-
07-11-2017, 07:13 AM
Post: #13
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-10-2017 11:52 PM)Joe Horn Wrote:
(07-10-2017 08:05 PM)COB160 Wrote:  I don know

Press Home, Help, Tree (soft key), up-cursor, Enter. What "Software Version" is shown?

It is written:
Software version: 2015 6 17 (8151)
Hardware version: C
CAS Version:1.1.2-11
Serial Number...
Operating System: V0.041.558
07-11-2017, 07:48 AM
Post: #14
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
(07-11-2017 07:13 AM)COB160 Wrote:
(07-10-2017 11:52 PM)Joe Horn Wrote:  Press Home, Help, Tree (soft key), up-cursor, Enter. What "Software Version" is shown?

It is written:
Software version: 2015 6 17 (8151)
Hardware version: C
CAS Version:1.1.2-11
Serial Number...
Operating System: V0.041.558

I downloaded HP Connectivity Kit for Mac OS, but I cannot upgrade the calculator... I have read that if the version firmware I have is too old, I had to upgrade the calculator from windows.
07-11-2017, 07:49 AM
Post: #15
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
If I have lines on the screen when i scroll history data, could the upgrade fix it?
07-11-2017, 12:44 PM (This post was last modified: 07-11-2017 12:45 PM by COB160.)
Post: #16
 COB160 Junior Member Posts: 35 Joined: Jul 2017
RE: Contradiction between CAS and Home
Here are the lines I told about

https://www.dropbox.com/s/acfvmdpkpk1b8i...e.MOV?dl=0

Is it normal?
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