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

Step & Key Operation

Display

Notes

(When using EL-9650/9600c)

(When using EL-9650/9600c)

 

*Use either pen touch or cursor to operate.

 

 

2-2Is x + y = x +y? Think about this problem according to the cases

when x or y are positive or negative.

If x 0 and y 0 [e.g.; (x, y) = (2,7)]

If x 0 and y 0 [e.g.; (x, y) = (-2, 7)]

If x 0 and y 0 [e.g.; (x, y) = (2, -7)]

If x 0 and y 0 [e.g.; (x, y) = (-2, -7)]

x +y = 2 + 7 = 9

x+y = 2 + 7 = 9

x + y = x + y.

x +y = -2 + 7 = 5

x+y = -2 + 7 = 9

x + y x + y.

x +y = 2-7 = 5

x+y = 2 + -7 = 9

x + y x + y.

x +y = -2-7 = 9

x+y = -2 + -7 = 9

x + y = x + y.

Therefore x +y=x+ywhen x 0 and y 0, and when x 0 and y 0.

3-1

Evaluate

 

 

6-9

 

 

. Evaluate

 

 

6-9

 

.

 

 

 

 

 

 

 

 

1+3

 

 

 

 

1+3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CL

 

MATH

 

1

 

*

a/b

 

 

6

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*

1

 

 

 

+

 

 

3

 

ENTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MATH

 

1

*

6

 

 

 

9

 

 

 

 

 

 

 

*

 

a/b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MATH

 

1 *

1

 

+

 

3

 

ENTER

 

 

 

3-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is x /y = x/y?

 

 

 

 

 

 

 

 

 

 

 

 

Think about this problem according to the cases when x or y are positive or negative.

If x 0 and y 0 [e.g.; (x, y) = (2,7)]

If x 0 and y 0 [e.g.; (x, y) = (-2, 7)]

If x 0 and y 0 [e.g.; (x, y) = (2, -7)]

If x 0 and y 0 [e.g.; (x, y) = (-2, -7)]

6-9

6-9

 

1+3

= 0.75 , 1+3

= 0 .75

6-9 = 6-9

1+3 1+3

x /y = 2/7 = 2/7

x/y = 2 /7 = 2/7

x /y = x / y

x /y = (-2)/7 = 2/7

x/y = -2 /7 = 2/7

x /y = x / y

x /y = 2/(-7) = 2/7

x/y = 2 /-7 = 2/7

x /y = x / y

x /y = (-2)/-7 = 2/7

x/y = -2 /-7 = 2/7

x /y = x / y

The statement is true for all y 0.

The EL-9650/9600c/9450/9400 shows absolute values with , just as written on paper, by using the Equation editor. The nature of arithmetic of the absolute value can be learned through arithmetical operations of absolute value functions.

8-5

Page 44
Image 44
Sharp EL-9650, EL-9400, EL-9600c manual Evaluate

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

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