HP 38g Graphing Calculator User Manual

Page 98

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

Sequence

Example,
continued

■ [VIEWS]

Select Auto

Scale {{OK}}

Explore the graph and the

values for N and Ul by

pressing

and

[^.

As you trace the graph with the cursor keys, the crosshairs
jump from N:1 to N:2 to N:3, and so on. The values for Ul

change by smaller and smaller amounts until they converge.

NUM

1.5

1.415557

l.HlHilS

I.HIHBIH

1.41421356237

Scroll down to see that the

values for U] remain the same

for N»6. Therefore, -Jl is

1.41421356237 to 12 digits of

accuracy.

Compare the Stairstep plot (which plots N and Ul (N)) to a
Cobweb plot (which plots Ul(N-l) and U1(N)). Use

autoscaling for the plot. The coordinate values and the

Numeric view are identical to the Stairstep plot.

■ {SETUP-PLOT} [3

Set SEQPLOT to

Cobweb.

{VIEWS}

Select Auto

Scale {{OK}}

3-34

Plotting and Exploring Functions