Chapter 10: Matrices
151
Using Math Functions with Matrices
Using Math Functions with Matrices
You can use many of the math functions on the TI-84 Plus keypad, 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, Multiplication
To add or subtract 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
N
matrixB
To multiply two matrices together, the column dimension of
matrixA
must match the row dimension
of
matrixB
.
matrixA
…
matrixB
Multiplying a
matrix
by a
value
or a
value
by a
matrix
returns a matrix in which each element of
matrix
is multiplied by
value
.
matrix
…
value
value
…
matrix
