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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