Casio CFX-9800G - Page 111

Pressing FO), causes the following menu to appear on the display.
FG)
[ecafe-calird.
Ye BB
“Press the function key below the operation you want to specify.
(F)(Y-CA) y-coordinate value for a given x-coordinate
* A(KCA) coordinate value for a given y-coordinate
\(d/dx) Derivative for a given point
Except for the intersection of two graphs, all of the following operations are performed
after drawing of the following: function graphs.
“ Memory Area ¥1:
Memory Area Y2: y
x+1
X (x, + 2) (x ~ 2)
ot
The range parameter settings shown here are also used.
CREP),
*For details on drawing graphs, see section “8-10 Storing Functions in Memory” starting
on page 176.
Determining Roots
Example] To determine the roots for y = x (x + 2) (x - 2):
Fi}(RT)
»-+{Thisi puts the unit into standby wattod fore 2 *
selection af a graph.) +. 2. ®
°A ‘“‘m"' cursor appears on the graph that has
the lowest memory area number.
Specify the graph you want to use--'
*Use
@and@
to
move
the
cursor
to
the
graph
whose
roots
you
want
to
find.
Determine the root.
(exe)
*Roots
are
found
starting
from
the
left.
Search for the ‘next root to the right.
elf
there.
is
no
root
to
the
right,
nothing
happens
when
you
press
@.
*You
can
use
@
to
move
back
to
the
left.
elf
there.is-only
one
graph,
pressing
Fi(RT)
directly
displays
the
root
(selection
of
the
graph
is
not
required).
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