HP-35 origin
06-20-2018, 07:31 PM
Post: #17
 brickviking Senior Member Posts: 336 Joined: Dec 2014
RE: HP-35 origin
(06-19-2018 10:22 AM)StephenG1CMZ Wrote:
(06-18-2018 12:02 AM)brickviking Wrote:  If I took that phrase literally (Pi !!!), HP-50G calculates that to be 9.99999999999 E499. Somehow, I think even HP wouldn't be that crazy. Pi !! came to about 7380.55555766, and Pi! comes to 7.1881-ish, or so my HP-34C told me back in the day. That might be closer to the scale that HP was originally thinking of.

(Post 244)

I am curious - How did you parse that expression?

X!! Is not the same as (X!)! If you have heard of double-factorials, although of course it is if you haven't, ! Being an ambiguous mathematical symbol.

Is that x!!! (A triple factorial?)
(X!!)! (Factorial of a double factorial)
(X!)!! (Double factorial of a factorial)
((X!)!)! (Factorial of a factorial of a factorial)

I parsed that as the following procedure would indicate:
$$(((\pi!)!)!)$$, therefore would have approximately been:
$$\pi! = 7.18808272898$$
$$7.18808272898! = 7380.55555766$$
$$7380.55555766! = OVERFLOW$$(at least for my 50G)

And I'd have to check what on earth are double-factorials or triple-factorials. I haven't heard of such a beast.

(Later) Oh, so that's what those are. Interesting.

(Post 246)

Regards, BrickViking
HP-50g |Casio fx-9750G+ |Casio fx-9750GII (SH4a)
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 Messages In This Thread HP-35 origin - hibiki - 06-16-2018, 10:58 PM RE: HP-35 origin - TomC - 06-17-2018, 05:56 PM RE: HP-35 origin - mcquiggi - 06-17-2018, 06:15 PM RE: HP-35 origin - drdbthompson - 06-17-2018, 06:57 PM RE: HP-35 origin - brickviking - 06-18-2018, 12:02 AM RE: HP-35 origin - mcquiggi - 06-18-2018, 12:36 AM RE: HP-35 origin - Harald - 06-18-2018, 07:47 PM RE: HP-35 origin - brickviking - 06-18-2018, 11:05 PM RE: HP-35 origin - Gerson W. Barbosa - 06-19-2018, 08:15 AM RE: HP-35 origin - ttw - 12-10-2018, 04:00 AM RE: HP-35 origin - StephenG1CMZ - 06-19-2018, 10:22 AM RE: HP-35 origin - Thomas Okken - 06-19-2018, 11:09 AM RE: HP-35 origin - brickviking - 06-20-2018 07:31 PM RE: HP-35 origin - Gerson W. Barbosa - 12-10-2018, 02:41 AM RE: HP-35 origin - badaze - 06-17-2018, 08:23 PM RE: HP-35 origin - Valentin Albillo - 06-18-2018, 10:27 PM RE: HP-35 origin - Steve Simpkin - 06-19-2018, 01:26 AM RE: HP-35 origin - Didier Lachieze - 06-19-2018, 05:29 AM RE: HP-35 origin - EdS2 - 06-19-2018, 07:40 AM RE: HP-35 origin - KimH - 12-06-2018, 01:29 PM

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