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Note 1N • Adding/Subtracting Matrices (continued)
On a clear Home screen, enter
on the screen is the sum of
Errors
If you get
ERR:DIM MISMATCH
that don't have the same dimensions.
An
message probably indicates that you have named a matrix
ERR:UNDEFINED
that is not defined.
Note 1P • Multiplying Two Matrices
To multiply two matrices, the number of columns in the first matrix must
match the number of rows in the second matrix. For example, if the first matrix
has dimensions 1
3 and the second matrix has dimensions 3
columns of the first matrix match the three rows of the second. The
multiplication will be defined.
Enter
and
as shown in the screens here. (See Note 1L.)
[D]
[C]
*
Display
(or
[D] [C]
[D]
[C]
appears on the screen. The dimensions of the product are (the number of rows
of the first matrix)
(the number of columns of the second matrix). In this
example, a
matrix times a
1
3
Errors
If you get
ERR:DIM MISMATCH
does not match the number of rows in the second.
An
message probably indicates that you have named a matrix
ERR:UNDEFINED
that is not defined.
26
Discovering Algebra Calculator Notes for the Texas Instruments TI-83 and TI-83/84 Plus
and press
[B]
[C]
ENTER
and
.
[B]
[C]
, you've tried to add (or subtract) two matrices
) on the Home screen and press
matrix has a
3
2
1
, then the number of columns in the first matrix
. The matrix showing
2, the three
. The product
ENTER
answer.
2
TI-83 and TI-83/84 Plus
©2007 Key Curriculum Press
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