Texas Instruments TITANIUM TI-89 - Manual (Page 902)

902 Appendix A: Functions and Instructions
ù (multiply) p key
expression1 ù expression2 ⇒ ⇒ ⇒ ⇒ expression
Returns the product of expression1 and expression2 .
2ù 3.45 ¸ 6.9
xù yù 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}
{2аa,3а2}щ {aс,bа3} ¸ {2ш 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 .
pщ {4,5,6} ¸ {4ш p 5ø p 6ø 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
]
lù identity(3) ¸





 l
0 0
0 l 0
0 0 l
а а а а
(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}
expression à list1 ⇒ list
list1 à expression ⇒ list
Returns a list containing the quotients of
expression divided by list1 or list1 divided by
expression.
a/{3,a,‡(a)} ¸




a
3 1 ‡a
{a,b,c}/(aù bù c) ¸
{
1
bø c
1
aø c
1
aø b
}
matrix1 à expression ⇒ matrix
Returns a matrix containing the quotients of
matrix1 à expression.
Note: Use . / (dot divide) to divide an expression
by each element.
[a,b,c]/(aù bù c) ¸
[
1
bøc
1
aøc
1
aшb
]