Casio FX-CG10, User Manual

Page: 197 / 608

5-56
Example Graph the two functions shown below, and determine the point of
intersection between Y1 and Y2.
Y1 =
x
+ 1, Y2 =
x 2
• You can calculate the point of intersection for rectangular coordinate graphs (Y=
f
(
x
) type)
and inequality graphs (Y
>
f
(
x
), Y
<
f
(
x
), Y
≥
f
(
x
) or Y
≤
f
(
x
)) only.
• 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
u
To determine the coordinates for given points
1. Draw the graph.
2. Select the function you want to perform.
!5
(G-SOLVE)
6
(
g
)
1
(Y-CAL) ...
y
-coordinate for given
x
6
(
g
)
2
(X-CAL) ...
x
-coordinate for given
y
3. If there are multiple graphs on the graph screen, one of them will start flashing. Use
f
and
c to move the flashing to the graph you want to select and then press
w
.
4. Input the given
x
-coordinate value or
y
-coordinate value.
Press
w
to calculate the corresponding
y
-coordinate value or
x
-coordinate value.
Example Graph the two functions shown below and then determine the
y
-
coordinate for
x
= 0.5 and the
x
-coordinate for
y
= 2.2 on graph Y2.
Y1 =
x
+ 1, Y2 =
x
(
x
+ 2)(
x
– 2)
• When there are multiple results for the above procedure, press e to calculate the next
value. Pressing d returns to the previous value.
• The X-CAL value cannot be obtained for a parametric function graph.