Texas Instruments Titanium TI-89, User Manual

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874 Appendix A: Functions and Instructions
list1
+
list2
⇒
list
matrix1
+
matrix2
⇒
matrix
Returns a list (or matrix) containing the sums of
corresponding elements in
list1
and
list2
(or
matrix1
and
matrix2
).
Dimensions of the arguments must be equal.
{22, p , p /2} ! L1 ¸ {22 p p /2}
{10,5, p /2} ! L2 ¸ {10 5 p /2}
L1+L2
¸
{32
p
+5
p
}
ans(1)+{ p , ë 5, ë p } ¸
{ p +32 p 0}
[a,b;c,d]+[1,0;0,1]
¸
[ ]
a+1 b
c d+1
expression
+
list1
⇒
list
list1
+
expression
⇒
list
Returns a list containing the sums of
expression
and
each element in
list1
.
15+{10,15,20} ¸ {25 30 35}
{10,15,20}+15
¸
{25 30 35}
expression
+
matrix1
⇒
matrix
matrix1
+
expression
⇒
matrix
Returns a matrix with
expression
added to each
element on the diagonal of
matrix1
.
matrix1
must be
square.
Note: Use .+ (dot plus) to add an expression to
each element.
20+[1,2;3,4] ¸
[
21 2
3 24
]
ì
(subtract)
|
key
expression1
-
expression2
⇒
expression
Returns
expression1
minus
expression2
.
6
ì
2
¸
4
p ì pà
6
¸
5 ø
p
6
list1
-
list2
⇒
list
matrix1
-
matrix2
⇒
matrix
Subtracts each element in list2 (or matrix2 ) from the
corresponding element in list1 (or matrix1 ), and
returns the results.
Dimensions of the arguments must be equal.
{22,
p
,
pà
2}
ì
{10,5,
pà
2}
¸
{12
p ì
5 0}
[3,4] ì [1,2] ¸ [2 2]
expression
-
list1
⇒
list
list1
-
expression
⇒
list
Subtracts each
list1
element from
expression
or
subtracts
expression
from each
list1
element, and
returns a list of the results.
15
ì
{10,15,20}
¸
{5 0 -5}
{10,15,20} ì 15 ¸ {-5 0 5}
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