Texas Instruments TI-83 - Using Math Functions with Matrices

Matrices 10-9
8310MTRX.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:35 PM Printed: 02/19/01 1:36
PM Page 9 of 16
You can use many of the math functions on the TI
-
83
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.
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
N
matrixB
To multiply (
¯
) two matrices together, the column
dimension of
matrixA
must match the row dimension of
matrixB
.
matrixA
ä
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
ä
value
value
ä
matrix
Negating a matrix (
Ì
) returns a matrix in which the sign
of every element is changed (reversed).
L
matrix
Using Math Functions with Matrices
Using Math
Functions with
Matrices
+ (Add), –
(Subtract),
ä
(Multiply)
L
(Negation)