Sharp EL-9900 - Manual (Page 62)

9
Advanced Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1. Press 2ndF MATRIX to access the matrix menu.
2. Press B (EDIT) 1 (mat A) to select matrix A.
3. Now, enter the size or dimension of the matrix. We will enter
the 3
×
3 matrix. 1 2 1
2 1 -1
1 1 -2
Press 3 ENTER 3 ENTER to set the dimension of the matrix at
three rows by three columns.
4. The calculator will now prompt you for the matrix. Enter the elements of
the matrix by pressing 1 ENTER 2 ENTER 1 ENTER 2 ENTER
1 ENTER (–) 1 ENTER 1 ENTER 1 ENTER (–) 2 ENTER .
5. Press 2nd QUIT to exit the display of matrix A.
6. Repeat the process to enter a 3
×
3 matrix B = 1 2 3
4 5 6
7 8 9 .
7. Matrix multiplication can be performed if the number of columns of the first
matrix is equal to the number of rows of the second matrix. In the matrix
multiplication A
×
B, the elements in the first row of A are multiplied to the
corresponding elements in the first column of B. The sum of these
multiplications is placed in the 1,1(first row, first column) position of the
resulting matrix. This process is repeated until each row of A has been
multiplied to each column of B. Press 2nd QUIT to leave matirx entry
mode.
8. To multiply the matrices A and B together, press 2ndF MATRIX A (NAME)
1 (mat A)
×
2ndF MATRIX 2 (mat B) and ENTER .
MATRIC SOLUTIONS TO
SYSTEMS OF LINEAR EQUATIONS
[ ]
[ ]