Texas Instruments TI-89 Titanium User Manual

Appendix A: Functions and Instructions 829
propFrac() MATH/Algebra menu
propFrac( expression1 [, var ]) ⇒ expression
propFrac( rational_number ) returns rational_number as
the sum of an integer and a fraction having the
same sign and a greater denominator magnitude
than numerator magnitude.
propFrac(4/3) ¸ 1 + 1/3
propFrac(ë 4/3)
¸ ë 1ì 1/3
propFrac( rational_expression,var ) returns the sum of
proper ratios and a polynomial with respect to
var .
The degree of
var in the denominator exceeds the
degree of
var in the numerator in each proper ratio.
Similar powers of
var are collected. The terms and
their factors are sorted with
var as the main variable.
If
var is omitted, a proper fraction expansion 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,
propFrac() is a faster but
less extreme alternative to
expand() .
propFrac((x^2+x+1)/(x+1)+
(y^2+y+1)/(y+1),x)
¸
propFrac(ans(1))
PtChg CATALOG
PtChg x , y
PtChg xList , yList
Displays the Graph screen and reverses the screen
pixel nearest to window coordinates
(
x , y ).
Note:
PtChg through PtText show continuing
similar examples.
PtChg 2,4 ¸
PtOff CATALOG
PtOff x , y
PtOff xList , yList
Displays the Graph screen and turns off the screen
pixel nearest to window coordinates
(
x , y ).
PtOff 2,4 ¸
PtOn CATALOG
PtOn x , y
PtOn xList , yList
Displays the Graph screen and turns on the screen
pixel nearest to window coordinates
(
x , y ).
PtOn 3,5 ¸
ptTest() CATALOG
ptTest ( x , y ) ⇒ Boolean constant expression
ptTest ( xList , yList ) ⇒ Boolean constant expression
Returns true or false . Returns true only if the screen
pixel nearest to window coordinates (
x , y ) is on.
ptTest(3,5) ¸ true

Texas Instruments TI-89 Titanium Specifications

General

Brand	Texas Instruments
Model	TI-89 Titanium
Category	Calculator
Language	English