Operation Manual

Matrices 10-3
8210MTRX.DOC TI-82, Chapter 10, English Bob Fedorisko Revised: 02/09/01 9:18 AM Printed:
02/09/01 12:38 PM Page 3 of 14
6. Press
y
ã
QUIT
ä
to return to the Home screen.
Begin on a blank line. Press
 ~
to
display the
MATRX MATH
menu. Press
†
until
the bottom items on the menu are shown, then
select
…
row+(
(item
A
).
…
row+(
is copied to the
Home screen.
7. Press
Ì
2
¢
. Press

1
(to select
ã
A
ä
from the
MATRX NAMES
menu). Press
¢
1
¢
2
¤ Í
. This multiplies row 1 by
L
2 and
adds it to row 2. The resulting matrix is
displayed and stored in
Ans
. The value of
ã
A
ä
is
not changed.
8. Press
 ~
to display the
MATRX MATH
menu. Select
…
row(
(item
0
) and then press
Ì
1
¢ y
ã
Ans
ä
¢
2
¤ Í
. This multiplies row
2 of the matrix in
Ans
by
L
1. Again, the
resulting matrix is displayed and stored in
Ans
.
9. Press
 ~
. Select
…
row+(
(item
A
). Press
Ì
2
¢ y
ã
Ans
ä
¢
2
¢
1
¤ Í
. This
multiplies row 2 of the matrix in
Ans
by
L
2 and
adds it to row 1. The resulting reduced row-
echelon form of the matrix is displayed and
stored in
Ans
.
1x
N
1z =
L
3sox=
-
3+ z
1y + 2z = 3 y = 3
N
2z