Texas Instruments PLUS TI-89 - Manual (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,л 5,л 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 .
6ì 2 ¸ 4
pì pа6 ¸
5ш 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,pа2}м {10,5,pа2} ¸
{12 pм 5 0}
[3,4]м [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.
15м {10,15,20} ¸ {5 0 -5}
{10,15,20}м 15 ¸ {-5 0 5}