Sharp EL-9650 Handbook page 20

Step & Key Operation
*Use either pen touch or cursor to operate.
2
1
-
Move the tracer near the left-hand
root.
TRACE
(repeatedly)
*
2
2
Zoom in on the left-hand root.
-
A 3
ZOOM
* *
2
3
Move the tracer to approximate the
-
root.
or
TRACE
*
3
1
Return to the previous decimal
-
viewing window.
H
ZOOM
*
2
*
3
2
Move the tracer to approximate
-
the middle root.
TRACE
(repeatedly)
*
4
Move the tracer near the right-
hand root.
Zoom in and move the tracer to
find a better approximate.
(repeatedly)
*
A 3
ZOOM
* *
or
TRACE
*
The calculator allows the roots to be found (or approximated) visually by
graphing a polynomial and using the Zoom-in and Trace features.
4-1
Display
Tracer
Tracer
(repeatedly)
*
(repeatedly)
*
EL-9650/9600c Graphing Calculator
Notes
Note that the tracer is flashing
on the curve and the x and y
coordinates are shown at the
bottom of the screen.
The root is : x
Tracer
The root is exactly x = 1.
(Zooming is not needed to
find a better approximate.)
Tracer
The root is : x
-0.42
2.42