Texas Instruments TITANIUM TI-89 - Manual (Page 849)

Appendix A: Functions and Instructions 849
nPr( matrix1 , matrix2 )
⇒ ⇒ ⇒ ⇒ matrix
Returns a matrix of permutations based on the
corresponding element pairs in the two matrices.
The arguments must be the same size matrix.
nPr([6,5;4,3],[2,2;2,2]) ¸
[
30 20
12 6
]
nSolve()
MATH/Algebra menu
nSolve( equation , varOrGuess )
⇒ ⇒ ⇒ ⇒ number or error_string
Iteratively searches for one approximate real
numeric solution to
equation for its one variable.
Specify varOrGuess as:
variable
– or –
variable = real number
For example, x is valid and so is x=3 .
nSolve(x^2+5xì 25=9,x) ¸
3.844 ...
nSolve(x^2=4,x=л 1) ¸ л 2.
nSolve(x^2=4,x=1) ¸ 2.
Note: If there are multiple solutions, you can
use a guess to help find a particular solution.
nSolve() is often much faster than solve() or
zeros() , particularly if the “|” operator is used to
constrain the search to a small interval containing
exactly one simple solution.
nSolve() attempts to determine either one point
where the residual is zero or two relatively close
points where the residual has opposite signs and
the magnitude of the residual is not excessive. If
it cannot achieve this using a modest number of
sample points, it returns the string “
no solution
found .”
If you use nSolve() in a program, you can use
getType() to check for a numeric result before
using it in an algebraic expression.
Note: See also cSolve() , cZeros() , solve() , and
zeros() .
nSolve(x^2+5xì 25=9,x)|x<0 ¸
ë 8.844 ...
nSolve(((1+r)^24ì 1)/r=26,r)|r>0 and
r<.25
¸ .0068 ...
nSolve(x^2=ë 1,x) ¸
"no solution found"
OneVar MATH/Statistics menu
OneVar list1 [ [, list2 ] [, list3 ] [, list4 ] ]
Calculates 1-variable statistics and updates all
the system statistics variables.
All the lists must have equal dimensions except
for
list4 .
list1 represents xlist.
list2 represents frequency.
list3 represents category codes.
list4 represents category include list.
Note: list1 through list3 must be a variable name
or c1–c99 (columns in the last data variable
shown in the Data/Matrix Editor).
list4 does not
have to be a variable name and cannot be c1–
c99.
{0,2,3,4,3,4,6}! L1 ¸
OneVar L1 ¸ Done
ShowStat ¸