Texas Instruments TI-83 PLUS - Manual (Page 272)

TI-83 Plus Matrices 269
Using Math Functions with Matrices
Using Math Functions with Matrices
You can use many of the math functions on the TI-83 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.
+ (Add), – (Subtract), ä (Multiply)
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 .