Absolute value: sometimes CAS is very clever, sometimes not!

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Absolute value: sometimes CAS is very clever, sometimes not!

09-07-2018, 08:57 AM (This post was last modified: 09-07-2018 03:21 PM by ijabbott.)

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ijabbott Offline

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RE: Absolute value: sometimes CAS is very clever, sometimes not!

For what it's worth, \(\big\lvert a+b \big\rvert-a-b \mid a\ge 0 \ \mathrm{and}\ b\ge 0\) simplifies to \(0\) on TI Nspire CAS.

[Image: BSKrivm.png]

[Image: BSKrivm.png]

UPDATE:

Not surprisingly, the TI-89 Titanium behaves the same:

[Image: lIoTQd7.png]

[Image: lIoTQd7.png]

Has anyone tried it on older HP (pre-Prime) CAS calculators yet?

— Ian Abbott

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Absolute value: sometimes CAS is very clever, sometimes not! - jfdHP - 09-06-2018, 06:14 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - Tim Wessman - 09-07-2018, 12:23 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - toml_12953 - 09-07-2018, 02:27 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-07-2018, 05:33 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - CyberAngel - 09-07-2018, 05:55 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-07-2018, 07:06 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - CyberAngel - 09-07-2018, 11:26 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-07-2018 08:57 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - Komanguy - 09-07-2018, 04:30 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - jfdHP - 09-07-2018, 09:06 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - compsystems - 09-07-2018, 06:34 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - CyberAngel - 09-07-2018, 06:37 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - compsystems - 09-07-2018, 06:46 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 03:37 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - Joe Horn - 09-08-2018, 04:38 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 05:32 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-08-2018, 06:05 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 09:43 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 10:43 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-08-2018, 10:52 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - compsystems - 09-08-2018, 03:28 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 04:06 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-08-2018, 11:11 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-09-2018, 06:19 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-09-2018, 09:56 AM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-09-2018, 01:45 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - ijabbott - 09-09-2018, 07:21 PM

RE: Absolute value: sometimes CAS is very clever, sometimes not! - parisse - 09-09-2018, 07:57 PM

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