Entering And Multiplying Matrices - Sharp EL-9900 Handbook Vol. 1 Operation Manual

Entering and Multiplying Matrices

A matrix is a rectangular array of elements in rows and columns that is treated as a single
element. A matrix is often used for expressing multiple linear equations with multiple
variables.
Example
Enter two matrices and execute multiplication of the two.
1.
Enter a 3 x 3 matrix A
2.
Enter a 3 x 3 matrix B
3.
Multiply the matrices A and B
Before
There may be differences in the results of calculations and graph plotting depending on the setting.
Starting
Return all settings to the default value and delete all data.
As the Matrix feature is only available on the Advanced keyboard, this section does not apply to the
Basic keyboard.
Step & Key Operation
1
1
- Access the matrix menu.
B
2nd F MATRIX
1
1
2
- Set the dimension of the matrix at
three rows by three columns.
3 3
ENTER ENTER
1
3
Enter the elements of the first row,
-
the elements of the second row, and
the elements of the third row.
1 2
ENTER ENTER
2 1
ENTER ENTER
1 1 ENTER
ENTER
A
1 2 1
2 1 -1
1 1 -2
Display
1 ENTER
-
( )
1
ENTER
-
( )
2
ENTER
EL-9900 Graphing Calculator
B
1 2 3
4 5 6
7 8 9
Notes
8-1