HP-27s and direct solutions legend
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11-04-2018, 07:45 PM
(This post was last modified: 11-04-2018 07:48 PM by Vincent Weber.)
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RE: HP-27s and direct solutions legend
Yes it is - symbolic functions based on the underneath RPL system to do simple variable isolation, provided the variable only appears once in the equation.
That's why X^2-4=0 cannot return -2 as a root, no matter what the initial guesses are, because the equation is directly solved to X=2. But if you write X^2-4+0*X=0, you fool the system into believing that the variable appears twice, hence forcing iterative solving - which can lead to -2 with proper initial guesses. I verified this on the real HP-27S, that's why I don't understand Craig's statement. |
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Messages In This Thread |
HP-27s and direct solutions legend - Vincent Weber - 11-04-2018, 12:53 PM
RE: HP-27s and direct solutions legend - ijabbott - 11-04-2018, 06:59 PM
RE: HP-27s and direct solutions legend - Vincent Weber - 11-04-2018 07:45 PM
RE: HP-27s and direct solutions legend - ijabbott - 11-04-2018, 07:59 PM
RE: HP-27s and direct solutions legend - Vincent Weber - 11-04-2018, 08:13 PM
RE: HP-27s and direct solutions legend - rprosperi - 11-04-2018, 09:02 PM
RE: HP-27s and direct solutions legend - Benoit Maag - 11-04-2018, 11:49 PM
RE: HP-27s and direct solutions legend - Vincent Weber - 11-05-2018, 12:06 PM
RE: HP-27s and direct solutions legend - Jlouis - 11-06-2018, 05:01 PM
RE: HP-27s and direct solutions legend - Vincent Weber - 11-06-2018, 05:17 PM
RE: HP-27s and direct solutions legend - Thomas Okken - 11-07-2018, 11:25 AM
RE: HP-27s and direct solutions legend - Dave Britten - 11-05-2018, 02:07 PM
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