Casio FX-8700G Manuel du propriétaire télécharger pdf (Page 5)

The graphing calculator offers you much more

flexibility in studying graphs than can be obtained

by paper and pencil graphing. Within seconds you

can graph an equation or a system of equations that

could take you several minutes to sketch. The

various functions on a graphing calculator can also

help you to analyze the graph in a way not possible

with traditional graphing techniques. For example,

when graphing an equation such as y  x



 2x

 x  10, no longer do you have to

spend time calculating the long list of ordered pairs

that give you points to sketch the curve. No longer

do you have to use the tedious repeated

calculations of the Location Principle to find the

zeros of the function. Instead, you can concentrate

on the attributes of the graph itself—For

what values of x is y increasing? Where does the

graph reach a maximum point or does it have

several maxima? Does the graph intersect the

x-axis? If so, how many times? How does the

behavior of the graph relate to the equation of the

graph? and so on.

It is important to understand that it is okay and

many times necessary to solve problems with a

calculator and that most of the time the calculator

does not “find the answer” but merely helps to find

appropriate solutions to problems. If you do not

understand how to interpret the information the

calculator provides, then it is of no use. It is still up

to you to make connections with the technology

and the mathematical concepts. The calculator

simply saves time and effort and allows you to go

deeper into mathematical concepts than you could

in the past. It also opens the door to solving

previously-unsolvable problems.

The calculator is not the solve-all instrument for

mathematical problems, but a tool for completing

the tedious tasks that used to take hours and lots of

paper to achieve before you could get to the real

meat of the problem. You should experiment with

the calculator to find applications that are

appropriate to the topic being studied.

The graphing calculator allows you to look at many

new areas of mathematics that until now were

restricted at certain levels because of their

difficulty. While it may take time to feel

comfortable with using graphing calculators and

you may be just beginning to learn how to use

them, it is important to keep trying and to keep

learning. Knowing when and how to use a graphing

calculator to solve problems will help you become

a better problem solver and that, of course, is the

ultimate goal.

In this guide to using graphing calculators in the

science classroom, you will encounter keystroke

instructions for graphing various types of equations,

as well as mathematical computations. Graphing

calculators are scientific calculators, as well as

hand-held computers, thus eliminating the need for

one calculator to graph and one to compute. There

are many manufacturers of graphing calculators

including Casio, Hewlett-Packard, Sharp, and Texas

Instruments. While all calculators share some

common characteristics, each differs in its

complexity and capabilities to graph various types

of functions.

In this guide, we will present keystrokes for Casio

and Texas Instruments calculators. The material in

this book is appropriate for both students and

teachers. Some of the procedures and keying

sequences found in this text may be helpful in

interpreting the instruction guides for other

calculators you may encounter.

To promote understanding of the sequencing of

keystrokes provided in this booklet, read through

the list of keystrokes first before entering them to

make sure you understand the purpose and

sequence. When solving a problem on your own

for the first time, it may be wise to write out the

keystrokes first before entering them into the

calculator.

GRAPHING

CALCULATORS

IN THE

SCIENCE

CLASSROOM

An Introduction

to Graphing

Calculators

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Casio FX-8700G Manuel du propriétaire Page 5

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