Casio FX-7400GII - SOFTWARE VERSION 2-00 User Manual page 138

• You can calculate the point of intersection for rectangular coordinate graphs (Y=
and inequality graphs (Y
• Either of the following can cause poor accuracy or even make it impossible to obtain
solutions.
- When a solution is a point of tangency between two graphs
- When a solution is an inflection point
Determining the Coordinates for Given Points
The following procedure describes how to determine the
x
-coordinate for a given
1. Draw the graph.
2. Select the function you want to perform. When there are multiple graphs, the selection
cursor ( ) appears at the lowest numbered graph.
(G-SLV)
3. Use to move the cursor ( ) to the graph you want, and then press
x
4. Input the given -coordinate value or
Press to calculate the corresponding
Example Graph the two functions shown below and then determine the
coordinate for
Y1 =
• When there are multiple results for the above procedure, press
value. Pressing
• The X-CAL value cannot be obtained for a parametric function graph.
Calculating the lntegral Value for a Given Range
Use the following procedure to obtain integration values for a given range.
1. Draw the graph.
2. Press (G-SLV)
selection cursor ( ) to appear at the lowest numbered graph.
3. Use to move the cursor ( ) to the graph you want, and then press
4. Use to move the lower limit pointer to the location you want, and then press
5. Use to move the upper limit pointer to the location you want.
6. Press to calculate the integral value.
f x f x
( ), Y ( ), Y
y
.
y
( ) (Y-CAL) ... -coordinate for given
x
( ) (X-CAL) ... -coordinate for given
y
-coordinate value.
x
= 0.5 and the
x x x
+ 1, Y2 = ( + 2)(
returns to the previous value.
dx
( ) ( ). When there are multiple graphs, this causes the
5-32
f x f x
( ) or Y ( )) only.
y
-coordinate for a given
x
y
y
-coordinate value or
x
-coordinate for
x
– 2)
f x
( ) type)
x
, and the
to select it.
x
-coordinate value.
y
-
y
= 2.2 on graph Y2.
to calculate the next
to select it.
.