Texas Instruments TI-89 Titanium Short User Manual

210 Appendix A: Functions and Instructions
nCr() MATH/Probability menu
nCr( expression1 , expression2 ) ⇒ expression
For integer expression1 and expression2 with
expression1 ‚ expression2 ‚ 0, nCr() is the number
of combinations of
expression1 things taken
expression2 at a time. (This is also known as a
binomial coefficient.) Both arguments can be
integers or symbolic expressions.
nCr( expression, 0) ⇒ 1
nCr( expression, negInteger ) ⇒ 0
nCr( expression, posInteger ) ⇒
expressionø ( expression ì 1) ... ( expressionì posInteger +1)/
posInteger !
nCr( expression, nonInteger ) ⇒ expression !/
((
expressionì nonInteger )! ø nonInteger !)
nCr(z,3)
zø (zì 2)ø (zì 1)
6
ans(1)|z=5 10
nCr(z,c)
z!
c!(zì c)!
ans(1)/nPr(z,c)
1
c!
nCr( list1 , list2 ) ⇒ list
Returns a list of combinations based on the
corresponding element pairs in the two lists. The
arguments must be the same size list.
nCr({5,4,3},{2,4,2}) ¸
{10 1 3}
nCr( matrix1 , matrix2 ) ⇒ matrix
Returns a matrix of combinations based on the
corresponding element pairs in the two matrices.
The arguments must be the same size matrix.
nCr([6,5;4,3],[2,2;2,2]) ¸
[
15 10
6 3
]
nDeriv() MATH/Calculus menu
nDeriv( expression1 , var [, h ]) ⇒ expression
nDeriv( expression1 , var, list ) ⇒ list
nDeriv( list , var [, h ]) ⇒ list
nDeriv( matrix , var [, h ]) ⇒ matrix
Returns the numerical derivative as an
expression. Uses the central difference quotient
formula.
h is the step value. If h is omitted, it defaults to
0.001.
When using
list or matrix , the operation gets
mapped across the values in the list or across the
matrix elements.
Note: See also
avgRC() and d ().
nDeriv(cos(x),x,h) ¸
ë (cos(xì h)ì cos(x+h))
2ø h
limit(nDeriv(cos(x),x,h),h,0)
¸
ë sin(x)
nDeriv(x^3,x,0.01)
¸
3.ø (xñ +.000033)
nDeriv(cos(x),x)|x=p/2
¸
ë 1.
nDeriv(x^2,x,{.01,.1}) ¸
{2.ø x 2.ø x}
NewData CATALOG
NewData dataVar , list1 [, list2 ] [, list3 ]...
Creates data variable dataVar, where the columns
are the lists in order.
Must have at least one list.
list1 , list2 , ..., listn can be lists as shown,
expressions that resolve to lists, or list variable
names.
NewData makes the new variable current in
the Data/Matrix Editor.
NewData mydata,{1,2,3},{4,5,6}
¸
Done
(Go to the Data/Matrix Editor and open the
var mydata to display the data variable
below.)

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches