Texas Instruments TI-Nspire CAS User Manual

propFrac()
Catalog >
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().
You can use the propFrac() function to
represent mixed fractions and demonstrate
addition and subtraction of mixed fractions.
Q
QR
Catalog >
QR Matrix, qMatrix, rMatrix[, Tol]
Calculates the Householder QR factorization
of a real or complex matrix. The resulting Q
and R matrices are stored to the specified
Matrix. The Q matrix is unitary. The R
matrix is upper triangular.
Optionally, any matrix element is treated as
zero if its absolute value is less than Tol.
This tolerance is used only if the matrix has
floating-point entries and does not contain
any symbolic variables that have not been
assigned a value. Otherwise, Tol is ignored.
• If you use /· or set the Auto or
Approximate mode to Approximate,
The floating-point number (9.) inm1 causes
results to be calculated in floating-point
form.
Alphabetical Listing 137

Texas Instruments TI-Nspire CAS Specifications

General

Type	Graphing
Cover	-
Form factor	Pocket
Control type	Buttons, Touch
Product color	Grey, Silver
Digits	- digits
Display tilting	No
Display resolution	320 x 240 pixels
Display number of lines	- lines
Compatible operating systems	Windows XP/2000\\r Mac OS X 10.4/10.5
Battery type	AAA
Power source	Battery
Number of batteries supported	4
USB port	Yes
USB 2.0 ports quantity	1
RAM capacity	16 MB
ROM capacity	20 MB

Weight and Dimensions

Depth	198.3 mm
Width	100 mm
Height	28.7 mm