Appendix A: Functions and Instructions 531
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 531 of 132
.. (dot subt.) ¶|keys
matrix1 .
ì
matrix2 ⇒ matrix
expression .ìmatrix1 ⇒ matrix
matrix1 .ìmatrix2 returns a matrix that is the
difference between each pair of
corresponding elements in matrix1 and
matrix2.
expression .ìmatrix1 returns a matrix that is
the difference of expression and each element
in matrix1.
[a,2;b,3].ì[c,4;d,5] ¸
x.ì
[
c,4;
d
,5
]
¸
.ù(dot mult.) ¶pkeys
matrix1 .
ù
matrix2 ⇒ matrix
expression .
ù
matrix1 ⇒ matrix
matrix1 . ùmatrix2 returns a matrix that is the
product of each pair of corresponding
elements in matrix1 and matrix2.
expression . ùmatrix1 returns a matrix
containing the products of expression and
each element in matrix1.
[a,2;b,3].ù[c,4;5,d] ¸
x.ù[a,b;c,d] ¸
. / (dot divide) ¶ekeys
matrix1 . / matrix2 ⇒ matrix
expression . / matrix1 ⇒ matrix
matrix1 . / matrix2 returns a matrix that is the
quotient of each pair of corresponding
elements in matrix1 and matrix2.
expression . / matrix1 returns a matrix that is
the quotient of expression and each element in
matrix1.
[a,2;b,3]./[c,4;5,d] ¸
x.
/[
c,4;5,
d]
¸
.^ (dot power)¶Zkeys
matrix1 .^ matrix2 ⇒ matrix
expression . ^ matrix1 ⇒ matrix
matrix1 .^ matrix2 returns a matrix where
each element in matrix2 is the exponent for
the corresponding element in matrix1.
expression . ^ matrix1 returns a matrix where
each element in matrix1 is the exponent for
expression.
[a,2;b,3].^[c,4;5,d] ¸
x.^[c,4;5,d] ¸
! (factorial) TI-89: ¥ e key TI-92 Plus: 2 W key
expression1! ⇒ expression
list1! ⇒ list
matrix1! ⇒ matrix
Returns the factorial of the argument.
For a list or matrix, returns a list or matrix of
factorials of the elements.
The TI-89 computes a numeric value for only
non-negative whole-number values.
5! ¸120
{5,4,3}! ¸{120 24 6}
[1,2;3,4]! ¸[1 2
6 24]