Casio FX-CG500 User manual

QUICK START GUIDE

fx-CG500

Tap any icon to select the application.

Tap mat any time to return to the

menu screen.

Tap Mat any time to return to the Main menu.

Tap to advance to the next page.

In any menu application, press kfor

the onscreen keyboard.

Press cto power on. Then press c

to clear commands. Press Kc to

power off.

Press these keys for numbers, basic

operations, and the most common variables

Press Eto execute commands.

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fx-CG500

QUICK START GUIDE

fx-CG500

Main Menu ............................................ Page 3

Numerical Solve Menu ......................... Page 12

Graph and Table Menu ......................... Page 14

Conic Menu ......................................... Page 24

Statistics Menu .................................... Page 31

Author:

John Diehl

Casio Teacher Advisory Council

Editors:

Nathan Austin, Amber Branch, Amy Chow

Casio Education, Curriculum and Training Department

INDEX

fx-CG500 Quick Start Guide 3

If an object, such as a ball, is dropped from a initial height, c, the height, h, in feet, as a

function of time, t, in seconds, can be modeled by h= -16t2+ c.

If the object is tossed upwards with an initial velocity, v, then the model becomes

h= -16t2+ vt + c. These models ignore air resistance.

1. If a ball is dropped from a height of 120 feet,

compute the height after 2 seconds.

Tap Mfor the Main menu.

Press z16*2^2+120E.

For a more mathematical display, the raised exponent

template can be found on the Math1 Keyboard.

Press z16*2kO2:

+120E.

This expression can also be evaluated using a variable for

substitution. A command in the form expression | variable =

value means evaluate the expression with the given value(s)

substituted for the variable(s).

Press z16k_[)O2:

+120-U_[=2E.

MAIN MENU

fx-CG500 Quick Start Guide4

2. Compute the time when the height of the ball is

84 feet.

The value can be computed using the square root

and fraction templates from Math1.

Tap k5N84-

120Cz16E.

The value can also be computed using a solve

command from Math1. The format is

(equation,variable) even if there is only one variable

in the equation.

Tap)`z16_[)O

2:+120=84,_

[)E.

3. A ball is tossed upwards with an initial velocity

of 56 feet/second, from an initial height of 120 feet.

Compute the time and the height when the ball is at

a maximum height.

Commands such as fMax are found under the

Interactive and the Action menus. The Interactive

commands open a dialogue box which gives

prompts for the input. The fMax command uses x

as the default variable, but another variable such

as tcan be used.

MAIN MENU

fx-CG500 Quick Start Guide 5

Tap Interactive, Calculation, fMin/fMax, fMax

and complete the inputs as shown. (Part of the rst

coefcient, -16, has scrolled off the screen.)

Then tap OK.

4. Rewrite the expression from Question 3 in

factored form.

Tap Interactive, Transformation, factor, factor.

MAIN MENU

fx-CG500 Quick Start Guide6

Enter the expression in the box. Then tap OK.

5. This model expresses height, or position, as a

function of time. Construct a model for velocity as a

function of time.

The velocity would be the derivative of the position

function.

Tap Interactive, Calculation, diff.

MAIN MENU

fx-CG500 Quick Start Guide 7

Enter the expression in the box. (Again, part of the

rst coefcient, -16, has scrolled off the screen.)

Then tap OK.

Alternately, the template for a derivative from

Math2 can be used; the result will look the same.

MAIN MENU

fx-CG500 Quick Start Guide8

6. Compute the instantaneous velocity at time

2 seconds.

The only difference is to tap the bullet for Derivative

at value, and to enter the value in the last box.

For a more intuitive display, use the derivative

template from Math2 and the “with” (U) command

on Math3.

MAIN MENU

fx-CG500 Quick Start Guide 9

7. Compute the total net distance that the ball

travels.

The ball had an initial height of 120 and fell to height

of 0, so the net distance should be -120.

For a calculus connection, integrate the velocity

function.

Tap k9P.

Enter the integrand, the variable, and the limits.

The variable t can be found at 9, then tap E.

8. Compute the total distance that the ball travels.

The initial height and the maximum height are known,

so the total distance can be easily

computed.

For another calculus connection, another integral

can be used. The traditional approach is to use two

integrals, but it is quicker to use the absolute value

template, which can be found in 9.

MAIN MENU

fx-CG500 Quick Start Guide10

The ClassPad has a symbolic algebra system, sometimes called a computer algebra system,

or CAS. An important distinction is a calculator using symbolic algebra can manipulate

undeclared variables. The factoring example from Question 4 was an illustration. It is usually

a good idea to tap Edit, then Clear All Variables to ensure that the variables do not have

a value stored in memory. The next 2 questions illustrate additional symbolic algebra.

9. If a model for the height of a ball thrown upwards

as a function of time is given by h= -16t2+ vt + c,

compute an expression for the time when the ball

hits the ground.

Tap Interactive, Equation, solve.

Enter the equation in the box by pressing k

and tap _to view the variables. The negative

sign is to the left of 16 and has scrolled off.

Enter the variable in the second box and tap E,

or press the Ekey; then tap OK.

MAIN MENU

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