Mathematics Programs 15–13
Program Listing:
Program Lines:
(In RPN mode)
Description
Starting point for input of coefficients.
)
Loop–control value: loops from 1 to 12, one at a
time.
! L
Stores control value in index variable.
Checksum and length: 35E7 21
Starts the input loop.
"!1
L2
Prompts for and stores the variable addressed by i.
L
Adds one to i.
!
If i is less than 13, goes back to LBL L and gets the
next value.
!
Returns to LBL A to review values.
Checksum and length: 51AB 15
This routine inverts a 3
×
3 matrix.
%
Calculates determinant and saves value for the
division loop,
J.
! $
º
º
.
! %
Calculates E'
×
determinant =
AI – CG.
º
º
.
! &
Calculates F'
×
determinant =
CD – AF.
º
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