Sharp EL-9900 - Manual (Page 102)

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Chapter 6: Advanced Graphing Features — Advanced Keyboard
The calculator can accept up to three sequential equation
entries. We will use the v set, since the u set already has an
entry. Move the cursor down to the v(n) entry area, and press
C.
4. Enter 2
×
0.9 n-1 , then press
E.
The cursor will be set to the
fourth entry row v(nMin=).
5. Press C, then enter 1.
6. Press the G key to draw
the graph, then zoom the
graph so that it be comes
visible ( Z, 1 Auto).
7. Use the U function to
trace the graph. Press the ' key to trace the plotted graph
values.
When w, the third sequential equation set is entered, it can also
be compared with the two other equations; simply set the TYPE
under the FORMAT menu to either 4 uw to compare the first set
with the third, or 5 vw to compare the second and the third.
Note: Comparing a sequence with an empty set will result in an
error. If the v set is to be used, then the equation entry rows
will need to have appropriate entries.
Example 3: n-1-based Graphing (Web)
• Compare the u(n–1) value against the u(n) value of u(n-1) + 100.
This particular graph equation requires an index to the previous
term (u
n-1
).
1. Press @ f to enter
the FORMAT menu, then
press G to select G
TYPE.
2. Select 1 Web by pressing
1.