(12C) Determinant of the 3x3 Matrix

12082018, 03:25 PM
(This post was last modified: 12082018 04:27 PM by Albert Chan.)
Post: #3




RE: (12C) Determinant of the 3x3 Matrix
(12082018 01:59 PM)Dieter Wrote: Take a look at the keyboard. The numbers 1 through 9 are nicely arranged like the elements of a 3x3 matrix. It would work even better if the keyboard shape like a telephone. That way, the Cj input method match direct memorystore method. (No sign change needed) I would suggest forget about the shape of keyboard, and store the numbers to R1, R2, R3 ... So, both input methods get the same answer. It also helps when lookup the registers: R1 = first number (instead of R7) Edit: program can be shortened to 30 steps (possibly slightly faster too) Assuming above suggested input method: Code: RCL 5 RCL 9 × RCL 6 RCL 8 × − RCL 1 × 

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Messages In This Thread 
(12C) Determinant of the 3x3 Matrix  Gamo  12082018, 05:15 AM
RE: (12C) Determinant of the 3x3 Matrix  Dieter  12082018, 01:59 PM
RE: (12C) Determinant of the 3x3 Matrix  Albert Chan  12082018 03:25 PM
RE: (12C) Determinant of the 3x3 Matrix  Dieter  12082018, 04:40 PM

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