Sharp EL-9900 EL9900 Operation Manual - Page 62

MATRIC SOLUTIONS TO SYSTEMS OF LINEAR EQUATIONS 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 6 789 . 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 . 9 Advanced Keyboard/ALGEBRA USING THE SHARP EL-9900 Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.