Casio FX-7400GII - SOFTWARE VERSION 2-00 User Manual page 137

4. When there are multiple graphs on the screen, the selection cursor ( ) is located at the
lowest numbered graph. Press
select.
5. Press to select the graph where the cursor is located and display the value produced by
the analysis.
When an analysis produces multiple values, press
Pressing returns to the previous value.
• Either of the following can cause poor accuracy or even make it impossible to obtain
solutions.
- When the graph of the solution obtained is a point of tangency with the
- When a solution is an inflection point
Calculating the Point of Intersection of Two Graphs
Use the following procedure to calculate the point of intersection of two graphs.
1. Draw the graphs.
2. Press (G-SLV)
( ) appears at the lowest numbered graph.
3. Press and
4. Press to select the first graph, which changes the shape of the cursor from
5. Press and
6. Press to calculate the point of intersection for the two graphs.
When an analysis produces multiple values, press
Pressing returns to the previous value.
Example Graph the two functions shown below, and determine the point of
intersection between Y1 and Y2.
Y1 =
y
(Y-ICPT) ... -intercept
(ISCT) ... Intersection of two graphs
y
( ) (Y-CAL) ... -coordinate for given
x
( ) (X-CAL) ... -coordinate for given
dx
( ) ( ) ... Integral value for a given range
and
(ISCT). When there are three or more graphs, the selection cursor
to move the cursor to the graph you want to select.
to move the cursor to the second graph.
x x
+ 1, Y2 = 2
x
-coordinate
y
-coordinate
to move the cursor to the graph you want to
to calculate the next value.
to calculate the next value.
5-31
x
-axis
to .