Sharp EL9900 manual 1Move the tracer near the left-hand root

Page 20

EL-9900 Graphing Calculator

Step & Key Operation

Display

Notes

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.

6-1

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Contents EL-9900 Contents Read this first Always read Before StartingUsing this Handbook IntroductionFractions and Decimals ExamplePie Charts and Proportions BeforeSlope and Intercept of Linear Equations 1Enter the equation y = x for Y2 Parallel and Perpendicular Lines 2View the graphs Slope and Intercept of Quadratic Equations 1Change the equation in Y2 to y = x 2+2 1Access the Solver feature This screen will appear a few 4Enter the values L=15,000, I=0.09, N=48 Access the Solver feature 10π 200 15 π1Access the Solver feature 5Solve for the height and enter a starting point Graphing Polynomials and Tracing to Find the Roots 1Move the tracer near the left-hand root Graphing Polynomials and Jumping to Find the Roots = x 4 + x 3 5x 2 3x +Find the next root Solving a System of Equations by Graphing or Tool Feature 1Access the Tool menu. Select the number of variables Entering and Multiplying Matrices 1Multiply the matrices a and B together at the home screen Solving a System of Linear Equations Using Matrices 2Calculate B-1C Solving Inequalities EL-9900 Graphing Calculator = 2x 5 Solving Double Inequalities2x 5 ≥ = 2x 5 and y = 7 intersect at 6,7 + y ≤ + y ≤2x + y ≥ + 2y ≤ 1 x 2 + y ≥ + 2y ≤ 1 y ≤ +y ≥ 4 y ≥ 4 xContinuing key operations omitted Slope and Intercept of Absolute Value Functions If x ≥3View the graph Solving Absolute Value Equations Solve an absolute value equation 5 4x =Solving Absolute Value Inequalities = 10, y =2nd F Calc 2 x = = 9.999999999 Note Evaluating Absolute Value Functions +3 1+3Math Graphing Rational Functions + 1x Solving Rational Function Inequalities Graphing Parabolas = y 2 + 2 = y = +√ x +Change to parametric mode Graphing Circles Graph x 2 2x + y 2 + 4y =2x + y 2 + 4y = 2x + y+22 =For Y1 = Y1 2 for Y2, and y = -Y1 -2 for Graphing Ellipses View the graph Graphing Hyperbolas Zoom out the screen Key pad for the Sharp EL-9900 Calculator Key pad for the Sharp EL-9900 Calculator Sharp Graphing Calculator Step Sharp Corporation OSAKA, Japan