Using Math Functions With Matrices - Texas Instruments TI-82 STATS Manual Book

Using Math Functions with Matrices

Using Math
Functions with
Matrices
+ (Add), –
(Subtract), ä ä ä ä
(Multiply)
L (Negation)
You can use many of the math functions on the TI-82 STATS
keyboard, the
MATH
menu with matrices. However, the dimensions must be
TEST
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 matrixB
N
To multiply (¯) two matrices together, the column dimension
of matrixA must match the row dimension of matrixB.
ä ä ä ä
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.
ä ä ä ä
matrix value
ä ä ä ä
value matrix
Negating a matrix (Ì) returns a matrix in which the sign of
every element is changed (reversed).
matrix
L
menu, the
MATH NUM
menu, and the
MATH
Matrices 10–9