HP 39gs Quick Start Guide

12 Getting Started
Getting Started12
Now we can see that x=3.475 is a closer estimate to the root. Highlight this value and zoom in again to
get a third, more accurate approximation. This process can be continued, just like zooming in on a point
on a graph! Figure 28 shows the second zoom as described above, with x=3.4625 as the latest estimate
of the root.
Figure 28
Press SHIFT followed by NUM to see the Function Numeric Setup view, as shown in Figure 29. The
NUMSTART value is the x-value at the top of the table, as seen in Figure 28. The name is somewhat of a
misnomer, since one can scroll above this value. The NUMSTEP value shown in Figure 29 also corresponds
to the two zooms performed on the default step value of 0.1.
Figure 29
There are two options under the NUMTYPE field. The default option is Automatic, which means that the HP
39gs will supply x-values and function values in a table defined by the Function Numeric Setup view. The
other option is Build Your Own. With this option, the HP 39gs presents a blank table. The user enters x-
values of his/her choosing, and the calculator records those x-values and supplies the corresponding
function values.
Figure 30

HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm