Sharp EL-9900 EL9900 Operation Manual - Page 29

Composition Of Functions

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COMPOSITION OF FUNCTIONS 1. Press Y= and clear old expressions. 2. Enter the two functions to be composed for Y1 and Y2. For example, enter y=x2-1 for Y1 by pressing x x2 - 1 ENTER and y=x+1 for Y2 by pressing x + 1 ENTER . 3. Enter the composition of Y2 into Y1 for Y3 by pressing 2ndF VARS A 1 (Y1) ( 2ndF VARS 2 (Y2) ) ENTER . 4. Keep Y1 and Y2 graphs from appearing by deselecting Y1 and Y2. Do this by ▼▼▼ pressing ▼ ENTER ▼ ENTER . 5. Press ZOOM A 7 (Dec) to view the composition of Y2 into Y1 in the decimal window. 6. Change the Y3 composition to Y1 in Y2 by pressing Y= ▼ ▼ CL 2ndF VARS 2 (Y2) ( 2ndF VARS 1 (Y1) ) . 7. Press ZOOM A 7 (Decimal) to view the composition of Y1 into Y2 in the decimal window. 8 Basic Keyboard/ALGEBRA USING THE SHARP EL-9900 Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.

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8
Basic Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation.
Permission is granted to photocopy for educational use only.
1.
Press
Y=
and clear old expressions.
2.
Enter the two functions to be composed for Y1 and Y2.
For example, enter
y=x
2
–1 for Y1 by pressing
x
x
2
–
1
ENTER
and y=x+1 for Y2 by
pressing
x
+
1
ENTER
.
3.
Enter the composition of Y2 into Y1 for Y3 by pressing
2ndF
VARS
A
1
(Y1) (
2ndF
VARS
2
(Y2)
)
ENTER
.
4.
Keep Y1 and Y2 graphs from appearing by deselecting Y1 and Y2.
Do this by
pressing
ENTER
ENTER
.
5.
Press
ZOOM
A
7
(Dec) to view the composition of Y2 into Y1 in the
decimal window.
6.
Change the Y3 composition to Y1 in Y2 by pressing
Y=
CL
2ndF
VARS
2
(Y2)
(
2ndF
VARS
1
(Y1)
)
.
7.
Press
ZOOM
A
7
(Decimal) to view the composition of Y1 into Y2 in
the decimal window.
COMPOSITION OF FUNCTIONS
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▼
▼
▼
▼
▼
▼