Using a graphic display calculator
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser’s institute
Casio fx-9860GII
The calculator displays the maximum point on the curve at (1.5, −1.75).
Complex numbers
1.9 Operations with complex numbers
Example 12
Evaluate the following expressions
i
27 4 2
1
2
()( )++ −ii
ii
(2 + 3i ) ⋅ (3 − 4i )
iii
34+ i
iv
1
3
−
+
i
i
v
(1 − i )
3
Press
MENU
. You will see the dialog box as shown on the right.
Choose 1: RUN·MAT and press
Complex calculations are entered the same way as you
would enter a real expression.
To enter the imaginary number symbol i press
SHIF T
i.
Enter the expressions and then press
EXE
.
The results are as shown.
15
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