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Program Instructions:
1. Key in the program routines; press
t
2. Press
A to input coefficients of matrix and column vector.
3. Key in coefficient or vector value (A through L) at each prompt and press
4. Optional: press
I to compute inverse of 3 × 3 matrix.
t
5. Press
6. Optional: press
inverted matrix.
t
7. Press
M to multiply the inverted matrix by the column vector and to see
the value of X. Press
the value of Z.
8. For a new case, go back to step 2.
Variables Used:
A through I
J through L
W
X through Z
i
Remarks:
For 2 × 2 solutions use zero for coefficients C, F, H, G and for L. Use 1 for
coefficient I.
Not all systems of equations have solutions.
Example:
For the system below, compute the inverse and the system solution. Review the
inverted matrix. Invert the matrix again and review the result to make sure that the
original matrix is returned.
15–18
Mathematics Programs
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
Å
D to compute determinant of 3 × 3 system.
t
t
A and repeatedly press
¥
to see the value of Y, then press
Coefficients of matrix.
Column vector values.
Scratch variable used to store the determinant.
Output vector values; also used for scratch.
Loop–control value (index variable); also used for
scratch.
23X + 15Y + 17Z = 31
8X + 11Y – 6Z = 17
4X + 15Y + 12Z = 14
Size : 13.7 x 21.2 cm
when done.
¥
to review the values of the
¥
Page : 386
¥
.
again to see
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