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Table of Contents Matrices - Calculator Operations The graphing calculator can be used to do a variety of matrix calculations, as shown in the following.

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Presentation on theme: "Table of Contents Matrices - Calculator Operations The graphing calculator can be used to do a variety of matrix calculations, as shown in the following."— Presentation transcript:

1 Table of Contents Matrices - Calculator Operations The graphing calculator can be used to do a variety of matrix calculations, as shown in the following examples. Example 1: Use matrices A and B to solve the matrix equation...

2 Table of Contents Slide 2 Matrices - Calculator Operations Enter matrix A into the calculator. Press the MATRIX key... Press the right arrow twice (or the left arrow key once) to highlight EDIT... Press 1 or ENTER to select matrix A. Note that your screen may not look exactly like the one on the right. Press 2, then ENTER, and another 2 to select 2  2...

3 Table of Contents Slide 3 Matrices - Calculator Operations Press ENTER and notice that the screen changes to two rows and two columns... Type in the entries from matrix A, pressing ENTER after each number... Note that while the 5 is highlighted, the bottom left corner reads 2, 2 = 5, meaning the row 2 column 2 entry is 5.

4 Table of Contents Slide 4 Matrices - Calculator Operations Now enter matrix B. Press MATRIX and select EDIT... Press 2 to select matrix B... Enter in 2  2 and the entries of matrix B... Press 2nd|Quit to get the home screen.

5 Table of Contents Slide 5 Matrices - Calculator Operations Now we are ready to solve the matrix equation. First solve the equation for X... Now enter the right hand side of the equation into the calculator. Type in the (1/5)(4...

6 Table of Contents Slide 6 Matrices - Calculator Operations To enter matrix A, press MATRIX... and press ENTER to select matrix A... Now enter + 2 and MATRIX... Press 2 to select matrix B and )... Press ENTER for the answer to the equation...

7 Table of Contents Slide 7 Matrices - Calculator Operations Note that the answer to the matrix equation is a matrix... To have the calculator write the answers in fraction form, press MATH and then ENTER twice...

8 Table of Contents Slide 8 Matrices - Calculator Operations Example 2: Find A times B. Since these are the same two matrices from example 1, they are already entered into the calculator. From the home screen, use the MATRIX key twice to enter A and B... Press ENTER to get the result of the product...

9 Table of Contents Slide 9 Matrices - Calculator Operations Example 3: Find A -1 where A is given by... Enter A into the calculator... Press 2nd|Quit. Then use the MATRIX and x -1 keys to find the inverse matrix... To see the rest of the matrix the right arrow key can be pressed several times...

10 Table of Contents Slide 10 Matrices - Calculator Operations To find exact values, press MATH|FRAC... Again, the right arrow key can be used to see the last column...

11 Table of Contents Matrices - Calculator Operations


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