Texas Instruments TI-89 - Page 543

526 Appendix A: Functions and Instructions
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 526 of 132
+
(add)
«
key
expression1
+
expression2
⇒
expression
Returns the sum of
expression1
and
expression2
.
56
¸
56
ans
(1)
+4
¸
60
ans
(1)
+4
¸
64
ans
(1)
+4
¸
68
ans
(1)
+4
¸
72
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
pà6
¸
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,pà2}
ì
{10,5,pà2}
¸
{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}