Texas Instruments TI-89 Manual Book page 499

product()
MATH/List menu
product(list[, start[, end]])
Returns the product of the elements
contained in
They specify a range of elements.
product(matrix1[, start[, end]])
Returns a row vector containing the products
of the elements in the columns of
and
Start
range of rows.
Prompt
CATALOG
Prompt var1[, var2] [, var3] ...
Displays a prompt on the Program I/O screen
for each variable in the argument list, using
the prompt
expression in the corresponding variable.
must have at least one argument.
Prompt
propFrac ()
MATH/Algebra menu
propFrac(expression1[, var])
propFrac(rational_number)
rational_number
a fraction having the same sign and a greater
denominator magnitude than numerator
magnitude.
propFrac(rational_expression,var)
sum of proper ratios and a polynomial with
respect to
denominator exceeds the degree of
numerator in each proper ratio. Similar
powers of
their factors are sorted with
variable.
If is omitted, a proper fraction expansion
var
is done with respect to the most main
variable. The coefficients of the polynomial
part are then made proper with respect to
their most main variable first and so on.
For rational expressions,
faster but less extreme alternative to
expand()
PtChg
CATALOG
PtChg x, y
PtChg xList, yList
Displays the Graph screen and reverses the
screen pixel nearest to window coordinates
( , ).
x y
482 Appendix A: Functions and Instructions
expression
. and are optional.
list Start end
matrix
are optional. They specify a
end
. Stores the entered
var1?
expression
returns
as the sum of an integer and
returns the
. The degree of in the
var var
are collected. The terms and
var
as the main
var
propFrac()
.
product({1,2,3,4}) ¸
product({2,x,y}) ¸
product({4,5,8,9},2,3) ¸
product([1,2,3;4,5,6;7,8,9])
¸
product([1,2,3;4,5,6;7,8,9],
.
matrix1
1,2) ¸
Program segment:
©
Prompt A,B,C
©
EndPrgm
propFrac(4/3) ¸
propFrac(ë 4/3) ¸
propFrac((x^2+x+1)/(x+1)+
(y^2+y+1)/(y+1),x) ¸
in the
var
propFrac(ans(1))
is a
Note:
PtChg
continuing similar examples.
PtChg 2,4 ¸
2ø xø y
[28 80 162]
[4,10,18]
1 + 1/3
ë 1ì 1/3
through show
PtText
24
40