Finding A Local Minimum Or Maximum Point - Casio fx-9860GII Instructions Manual

1.8 Finding a local minimum or maximum point

Example 10
Find the minimum point on the graph of y = x
Draw the graph of y = x
Method 1 - using a table
You can look at a table of the values of the function.
Press MENU and choose 7: TABLE and press
Press SET.
F5
Choose a start and end point for the table and a step of 1.
Use the x-values from the graph you drew.
EXIT
Press .
SHIF T
Press SET UP.
Scroll down to Dual Screen and press
EXE F6
Press to view the table.
Press G·CON to display the graph alongside the table.
F5
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser's institute
2
− 2x + 3.
2 − 2x + 3 (See Example 8).
EXE
.
F1 T + G.
Casio fx-9860GII
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Using a graphic display calculator 11