HP-71B Enhanced Math LEX
01-10-2020, 04:44 PM (This post was last modified: 01-10-2020 04:45 PM by Albert Chan.)
Post: #7
 Albert Chan Senior Member Posts: 2,501 Joined: Jul 2018
RE: HP-71B Enhanced Math LEX
Thank you for the enhanced Math Lex

This is a cubic solver, AX³ + BX² + CX + D = 0, using the new ASINH.
Code shift and scale to match identity: sinh(3z) = 3 sinh(z) + 4 sinh(z)^3

Code:
10 DESTROY ALL @ COMPLEX A,B,C,D,E,F,G,H,K 20 INPUT "A,B,C,D ? ";A,B,C,D 30 E=3*A @ H=-B/E 40 E=((E*H+2*B)*H+C)/A 50 F=(((A*H+B)*H+C)*H+D)/A 60 K=SQRT(E/.75) 70 E=ASINH(-4*F/K^3)/3 @ G=(0,2*PI/3) @ F=E+G @ G=E-G 80 E=SINH(E) @ F=SINH(F) @ G=SINH(G) 90 DISP E*K+H @ DISP F*K+H @ DISP G*K+H

>RUN
A,B,C,D ? 1,-6,11,-6
(2,0)
(1,0)
(3,-0)

>RUN
A,B,C,D ? 1,2,3,4
(-1.65062919144,0)
(-.174685404282,1.54686888723)
(-.174685404282,-1.54686888723)
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 Messages In This Thread HP-71B Enhanced Math LEX - J-F Garnier - 01-09-2020, 07:30 PM RE: HP-71B Enhanced Math LEX - rprosperi - 01-09-2020, 10:36 PM RE: HP-71B Enhanced Math LEX - Valentin Albillo - 01-10-2020, 12:00 AM RE: HP-71B Enhanced Math LEX - charger73 - 01-10-2020, 07:23 AM RE: HP-71B Enhanced Math LEX - Raymond Del Tondo - 01-10-2020, 08:58 AM RE: HP-71B Enhanced Math LEX - Sylvain Cote - 01-10-2020, 04:16 PM RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020 04:44 PM RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020, 05:01 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-10-2020, 05:40 PM RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020, 06:29 PM RE: HP-71B Enhanced Math LEX - Erwin - 01-13-2020, 06:10 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-13-2020, 07:13 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-26-2020, 10:54 AM RE: HP-71B Enhanced Math LEX - Albert Chan - 01-26-2020, 03:08 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-27-2020, 08:05 AM RE: HP-71B Enhanced Math LEX - Albert Chan - 01-27-2020, 11:35 AM RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-27-2020, 12:42 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 02-12-2020, 07:55 AM RE: HP-71B Enhanced Math LEX - rprosperi - 02-12-2020, 01:55 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 02-14-2020, 12:23 PM RE: HP-71B Enhanced Math LEX - rprosperi - 02-14-2020, 03:04 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 03-19-2020, 07:30 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 04-27-2020, 09:42 AM RE: HP-71B Enhanced Math LEX - Erwin - 04-27-2020, 04:50 PM RE: HP-71B Enhanced Math LEX - Albert Chan - 03-17-2021, 09:00 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 03-18-2021, 08:22 AM RE: HP-71B Enhanced Math LEX - J-F Garnier - 08-08-2020, 09:37 AM RE: HP-71B Enhanced Math LEX - Valentin Albillo - 08-08-2020, 10:14 PM RE: HP-71B Enhanced Math LEX - Paul Dale - 08-09-2020, 11:15 AM RE: HP-71B Enhanced Math LEX - John Keith - 08-09-2020, 02:16 PM RE: HP-71B Enhanced Math LEX - Valentin Albillo - 08-09-2020, 03:49 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-10-2020, 08:21 PM RE: HP-71B Enhanced Math LEX - rprosperi - 08-10-2020, 09:42 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-11-2020, 02:47 PM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 08-11-2020, 04:24 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-11-2020, 05:06 PM RE: HP-71B Enhanced Math LEX - Gene - 08-09-2020, 01:49 AM RE: HP-71B Enhanced Math LEX - Paul Dale - 08-09-2020, 10:10 AM RE: HP-71B Enhanced Math LEX - John Keith - 08-09-2020, 01:04 PM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 08-11-2020, 05:17 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-13-2020, 07:35 AM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 08-13-2020, 03:27 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-13-2020, 04:00 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 08-14-2020, 07:53 AM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 08-14-2020, 09:06 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-20-2020, 08:11 PM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 08-20-2020, 08:34 PM RE: HP-71B Enhanced Math LEX - Erwin - 08-21-2020, 05:34 PM RE: HP-71B Enhanced Math LEX - J-F Garnier - 09-27-2020, 06:25 PM RE: HP-71B Enhanced Math LEX - Dave Frederickson - 09-27-2020, 06:52 PM

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