Texas Instruments TI-89 Titanium Short User Manual

60 Previews
2. Display and clear the Y= Editor. Then define
the sequence as
u1(n) = iPart(.8…u1(nN1)+1000).
Use iPart to take the integer part of the
result. No fractional trees are harvested.
To access iPart(, you can use 2I,
simply type it, or select it from the
CATALOG.
@8 # , 8 ¸ ¸ 2 I 14.8
j U1 c j N | 1 d « 1000 d
¸
3. Define ui1 as the initial value that will be
used as the first term.
Press ¸ 4000 ¸
4. Display the Window Editor. Set the n and
plot Window variables.
nmin=0 and nmax=50 evaluate the size of
the forest over 50 years.
Press 8 $ 0 D 50 D 1 D 1 D
5. Set the x and y Window variables to
appropriate values for this example.
Press 0 D 50 D 10 D 0 D 6000 D 1000
6. Display the Graph screen.
Press 8 %
Steps and keystrokes Display

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