You can enter and store matrices on your TI-84 Plus calculator. A matrix is a rectangular array of numbers arranged in rows and columns. The dimensions, r x c, of a matrix are defined by the number of rows and columns in the matrix.

Graphing calculators such as the TI83 and TI84 are able to do many different operations with matrices, including multiplication. Here, we will go over the steps needed to multiply two matrices in this type of calculator using the following example.

Matrices are the perfect tool for solving systems of equations (the larger the better). Fortunately, you can work with matrices on your TI-84 Plus. All you need to do is decide which method you want to use. A –1 *B method of solving a system of equations. What do the A and B represent? The letters A and B are capitalized because they refer to ...

Working with Matrices on the TI–84+ The “Matrix” menu can be found under the MATRIX button which is a 2 nd function button in blue above the x –1 key.

A matrix is like a grid. To access the matrix variables you need to press [MATRX] on a TI-83, or [2nd] [x-1] on a TI-83+ or higher. You can then scroll down to whatever matrix you want to use or press the corresponding number. Entering [, A, and ] for the matrix [A] will not work.

Matrix Operations on the TI-83/84 Written by Jeff O’Connell – [email protected] Ohlone College http://www2.ohlone.edu/people2/joconnell/ti/ Entering a Matrix: Press [2nd][MATRX] (TI-83+/84) or [MATRX] (TI-83) to see a screen with a menu that looks as shown in screen 1. The dimensions on the right of the names show that

The instructions below will demonstrate how to find the determinant of a matrix using the TI-82, TI-83 family or TI-84 Plus family . Example: For the following matrix A, find the determinant. Solution: To enter the matrix: 1) Press [MATRX] (Press [2nd] [MATRX] on the TI-83 Plus family and TI-84 Plus family ) 2) Scroll to Edit

You can use your TI-84 Plus calculator to perform matrix arithmetic. When evaluating arithmetic expressions that involve matrices, you usually want to perform the following basic operations: scalar multiplication, addition, subtraction, and multiplication.

Working with Matrices. You can enter matrices using the matrix editor on your graphing calculator. For example, you can perform the following operations on matrices: •

Creating an identity matrix of a certain size is useful in calculating certain types of problems, such as the steady state vector of Markov chains. The TI-83/84 can perform additional functions such as row operations, generating random matrices and other things, but these are these operations aren’t used on a regular basis, so check