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258
1(
an)
(Draws graph with an on the vertical
axis.)
Example 2 Draw a graph of an+1 = 2an + 1 with Σan on the vertical axis and n
on the horizontal axis, and with the points unconnected.
Use the same View Window parameters as those provided in Exam-
ple 1.
6(TABL)6(G•PLT)
(Selects plot type.)
6(Σ
an)
(Draws graph with Σan on the vertical
axis.)
• To input a different recursion formula after a graph is drawn, press ! Q. This
displays the Recursion Menu where you can input a new formula.
kk
kk
k Drawing a Convergence/Divergence Graph (WEB graph)
With this feature, you can draw a graph of an+1 = f
(an) where an+1 and an are the terms
of linear recursion between two terms, substituted respectively for y and x in the
function y = f
(x). The resulting graph can then be viewed to determine whether or not
the graph is convergent or divergent.
Example 1 To determine whether or not the recursion formula an+1 = –3an
2
+
3an is convergent or divergent.
Use the following table range.
Start = 0 End = 6
a0 = 0.01 an Str = 0.01
b0 = 0.11 bn Str = 0.11
Use the following View Window parameters.
Xmin = 0 Ymin = 0
Xmax = 1 Ymax = 1
Xscale = 1 Yscale = 1
16 - 3 Editing Tables and Drawing Graphs
123456
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