EL-9650/9600c/9450/9400 Graphing Calculator

Evaluating Absolute Value Functions

The absolute value of a real number x is defined by the following:

x =

x if

x

0

 

-xif

x

0

Note that the effect of taking the absolute value of a number is to strip away the minus sign if the number is negative and to leave the number unchanged if it is nonnegative.

Thus, x

0 for all values of x.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Example

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Evaluate various absolute value functions.

 

 

 

 

1. Evaluate

- 2(5-1)

 

 

 

 

 

2. Is -2+7 = -2 + 7?

 

 

 

 

 

Evaluate each side of the equation to check your answer.

 

 

 

 

Is x + y =x+ y for all real numbers x and y ?

 

 

 

 

If not, when will x + y = x+y ?

 

 

 

 

3. Is 6-9 =

6-9

?

 

 

 

 

 

 

 

 

 

 

 

 

1+3

1+3

 

 

 

 

 

Evaluate each side of the equation to check your answer. Investigate with

 

 

 

more examples, and decide if you think x / y=x/y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Before

There may be differences in the results of calculations and graph plotting depending on the setting.

 

 

Starting Return all settings to the default value and delete all data.

 

 

 

 

 

 

 

 

 

 

 

 

Step & Key Operation

Display

Notes

 

 

 

 

(When using EL-9650/9600c)

(When using EL-9650/9600c)

 

 

 

 

*Use either pen touch or cursor to operate.

 

 

 

1-1Access the home or computation screen.

1-2Enter y = -2(5-1)and evaluate.

The solution is +8.

MATH B *

1 )

1 * (-) 2

(

5 —

ENTER

 

 

2-1Evaluate-2 + 7. Evaluate-2+7.

-2 + 7 = 5, -2 + 7 = 9

 

 

 

-2 + 7 -2 + 7.

 

CL

 

 

MATH

MATH

1*

1 * (-) 2 1 * (-) 2

7 ENTER

+ 7

+

ENTER

MATH

8-5

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Sharp EL-9600c, EL-9400, EL-9650 manual Evaluating Absolute Value Functions

EL-9650, EL-9600c, EL-9400 specifications

The Sharp EL-9400 and EL-9450 are advanced programmable scientific calculators designed for professionals and students alike. Renowned for their versatile functionality and user-friendly interface, these calculators are popular in the fields of engineering, mathematics, and the sciences.

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