Casio CFX-9850G PLUS, User'S Manual & Technical Reference

Page: 173 / 486

145
9-2 Analyzing a Function Graph
The following two graphs are used for all of the examples in this section, except
for the example for determining the points of intersection for two graphs.
Memory location Y1 =
x
+ 1 Y2 =
x
(
x
+ 2)
(
x
– 2)
Use the View Window to specify the following parameters.
(A)
Xmin = –5 Ymin = –5
(B)
Xmin = –6.3 Ymin = –3.1
Xmax = 5 Ymax = 5 Xmax = 6.3 Ymax = 3.1
Xscale = 1 Yscale = 1 Xscale = 1 Yscale = 1
k k
k k
k
Determining Roots
Example To determine the roots for
y
=
x
(
x
+ 2)(
x
– 2)
View Window:
(B)
!5
(G-Solv)
1
(ROOT)
(This puts the unit into standby waiting
for selection of a graph.)
• A “
k
” cursor appears on the graph that has the lowest memory area number.
Specify the graph you want to use.
c
• Use
f
and
c
to move the cursor to the
graph whose roots you want to find.
Determine the root.
w
• Roots are found starting from the left.