Texas Instruments TI-83 Zooming In on the Table: Box with Lid

Getting Started 11
8300GETM.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 11:06 AM Printed: 02/19/01 11:06
AM Page 11 of 18
You can adjust the way a table is displayed to get more information about a
defined function. With smaller values for @Tbl, you can zoom in on the table.
1. Press 3 Í to set TblStart. Press Ë 1
Í to set @Tbl.
This adjusts the table setup to get a more
accurate estimate of X for maximum
volume Y1.
2. Press y [TABLE].
3. Press † and } to scroll the table.
Notice that the maximum value for Y1 is
410.26, which occurs at X=3.7. Therefore,
the maximum occurs where 3.6<X<3.8.
4. Press y [TBLSET]. Press 3 Ë 6 Í to
set TblStart. Press Ë 01 Í to set @Tbl.
5. Press y [TABLE], and then press † and }
to scroll the table.
Four equivalent maximum values are
shown, 410.60 at X=3.67, 3.68, 3.69, and
3.70.
6. Press † and } to move the cursor to 3.67.
Press ~ to move the cursor into the Y1
column.
The value of Y1 at X=3.67 is displayed on
the bottom line in full precision as
410.261226.
7. Press † to display the other maximums.
The value of Y1 at X=3.68 in full precision is
410.264064, at X=3.69 is 410.262318, and at
X=3.7 is 410.256.
The maximum volume of the box would
occur at 3.68 if you could measure and cut
the paper at .01-cm. increments.
Zooming In on the Table: Box with Lid