Using math functions with matrices, Addition, subtraction, multiplication – Texas Instruments TI-84 User Manual

Page 234

Chapter 10: Matrices

231

[matrix](row,column)

Using Math Functions with Matrices

You can use many of the math functions on the TI-84 Plus keyboard, the

MATH

menu, the

MATH NUM

menu, and the

MATH TEST

menu with matrices. However, the dimensions

must be appropriate. Each of the functions below creates a new matrix; the original matrix
remains the same.

Addition, Subtraction,

Addition, Subtraction, Multiplication

Multiplication

To add (

Ã) or subtract (¹) matrices, the dimensions must be the same. The answer is a

matrix in which the elements are the sum or difference of the individual corresponding
elements.

matrixA+matrixB
matrixA

matrixB

To multiply (

¯) two matrices together, the column dimension of

matrixA

must match the

row dimension of

matrixB