Sharp EL-9400, EL-9600c manual EL-9650/9600c Graphing Calculator

EL-9650/9600c Graphing Calculator

Step & Key Operation Display Notes

*Use either pen touch or cursor to operate.

2-1Move the tracer near the left-hand root.

TRACE * (repeatedly)

2-2Zoom in on the left-hand root.

ZOOM A * 3 *

Tracer

Note that the tracer is flashing on the curve and the x and y coordinates are shown at the bottom of the screen.

Tracer

2-3Move the tracer to approximate the root.

TRACE * or * (repeatedly)

3-1Return to the previous decimal viewing window.

ZOOM H *

2*

3-2Move 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)

ZOOM A * 3 *

TRACE * or * (repeatedly)

The root is : x -0.42

Tracer

The root is exactly x = 1. (Zooming is not needed to find a better approximate.)

Tracer

The root is : x 2.42

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