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Appendix A: Functions and Instructions 527
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 527 of 132
expression
-
matrix1
⇒
matrix
matrix1
-
expression
⇒
matrix
expression
ì
matrix1
returns a matrix of
expression
times the identity matrix minus
matrix1
.
matrix1
must be square.
matrix1
ì
expression
returns a matrix of
expression
times the identity matrix
subtracted from
matrix1
.
matrix1
must be
square.
Note:
Use
.
.
(dot minus) to subtract an
expression from each element.
20
ì
[1,2;3,4]
¸
[
19
ë
2
ë
3 16
]
ù
(multiply)
p
key
expression1
ù
expression2
⇒
expression
Returns the product of
expression1
and
expression2
.
2
ù
3.45
¸
6.9
x
ù
y
ù
x
¸
x
2
ø
y
list1
ù
list2
⇒
list
Returns a list containing the products of the
corresponding elements in
list1
and
list2
.
Dimensions of the lists must be equal.
{1.0,2,3}
ù
{4,5,6}
¸
{4. 10 18}
{2àa,3à2}
ù
{a
ñ
,bà3}
¸
{2
ø
a
b
2
}
matrix1
ù
matrix2
⇒
matrix
Returns the matrix product of
matrix1
and
matrix2
.
The number of rows in
matrix1
must equal
the number of columns in
matrix2
.
[1,2,3;4,5,6]
ù
[a,d;b,e;c,f]
¸
expression
ù
list1
⇒
list
list1
ù
expression
⇒
list
Returns a list containing the products of
expression
and each element in
list1
.
p
ù
{4,5,6}
¸
{4
ø
p 5
ø
p 6
ø
p}
expression
ù
matrix1
⇒
matrix
matrix1
ù
expression
⇒
matrix
Returns a matrix containing the products of
expression
and each element in
matrix1
.
Note:
Use
.
ù
(dot multiply) to multiply an
expression by each element.
[1,2;3,4]
ù
.01
¸
[
.01 .02
.03 .04
]
l
ù
identity(3)
¸
l 0 0
0 l 0
0 0 l
à
(divide)
e
key
expression1
à
expression2
⇒
expression
Returns the quotient of
expression1
divided by
expression2
.
2/3.45
¸
.57971
x^3/x
¸
x
2
list1
à
list2
⇒
list
Returns a list containing the quotients of
list1
divided by
list2.
Dimensions of the lists must be equal.
{1.0,2,3}/{4,5,6}
¸
{.25 2/5 1/2}