Texas Instruments TI-89 Titanium User Manual page 98

Steps and keystrokes
2. Display and clear the
define the 1st-order differential equation:
y1'(t)=.001y1...(100Ny1)
Press p to enter the ... shown above. Do
not use implied multiplication between the
variable and parentheses. If you do, it is
treated as a function call.
Leave the initial condition
With y1' selected, the device will
Note:
graph the solution curve, not the
y1
derivative y1'.
Press 8 # , 8 ¸ ¸ .001 Y1
p c 100 | Y1 d ¸
3. Display the
GRAPH FORMATS
Then set
Axes = ON
, and
Method = RK
To graph one differential equation,
Note:
Fields must be set to
If
Fields=DIRFLD
you graph.
@ 8 Í D D B 2 D D B 2 D B 1 D
B 1 ¸
Previews
. Then
Y= Editor
blank.
yi1
dialog box.
, ,
Labels = ON Solution
Fields = SLPFLD
or
SLPFLD FLDOFF
, an error occurs when
Display
.
.
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