Texas Instruments TI-89 Titanium Short User Manual page 180

progName
Define
block
EndPrgm
Creates
but cannot return a result using
execute a block of multiple statements.
can be either a single statement or a series
block
of statements separated with the ":" character.
also can include expressions and
block
instructions (such as
without restrictions.
Note: It is usually easier to author and edit a
program block in the Program Editor rather than
on the entry line.
DelFold
CATALOG
folderName1
DelFold
Deletes user-defined folders with the names
folderName1
displayed if the folders contain any variables.
Note: You cannot delete the
DelVar
CATALOG
var1
DelVar [,
Deletes the specified variables from memory.
deSolve()
MATH/Calculus menu
1stOr2ndOrderOde
deSolve(
dependentVar
Returns an equation that explicitly or implicitly
specifies a general solution to the 1st- or 2nd-
order ordinary differential equation (ODE). In the
ODE:
• Use a prime symbol ( ' , press 2
denote the 1st derivative of the dependent
variable with respect to the independent
variable.
• Use two prime symbols to denote the
corresponding second derivative.
The ' symbol is used for derivatives within
deSolve()
The general solution of a 1st-order equation
contains an arbitrary constant of the form @
where
The suffix resets to 1 when you use
ƒ
8: Clear Home
equation contains two such constants.
174
arg1Name, arg2Name, ...
(
as a program or subprogram,
progName
, ,
If Then
folderName2 folderName3
[, ] [,
,
etc. An error message is
folderName2,
main
var2 var3
] [, ] ...
independentVar
,
) ⇒
a general solution
only. In other cases, use
k
is an integer suffix from 1 through 255.
. The solution of a 2nd-order
Define listinpt()=prgm:Local
) = Prgm
. Can
Return
listinpt() ¸Enter name of list
, and )
Else For
NewFold games ¸
] ...
(creates the folder
DelFold games ¸
(deletes the folder
folder.
2! a ¸
(a+2)^2 ¸
DelVar a ¸
(a+2)^2 ¸
Note: To type a prime symbol ( ' ), press
,
2
deSolve(y''+2y'+y=x^2,x,y) ¸
right(ans(1))! temp ¸
) to
È
d
(temp,x,2)+2ù
¸
DelVar temp ¸
d
.
( )
k
,
or
ClrHome
Appendix A: Functions and Instructions
n,i,str1,num:InputStr "Enter
name of list",str1:Input
"No. of elements",n:For
i,1,n,1:Input "element
"&string(i),num:
num! #str1[i]:EndFor:EndPrgm
¸
games
games
È.
y=(@1øx+@2)ø
(@1øx+@2)ø
d
(temp,x)+tempìx^2
Done
Done
)
Done
)
2
16
Done
(a + 2)ñ
e
+xñ ì 4øx+6
ë x
e
+xñ ì 4øx+6
ë x
0
Done