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Blz. 4-5
Wijziging teken van een complex getal
Het teken van een complex getal kan gewijzigd worden met de toets \,
d.w.z. -(5-3i) = -5 + 3i
Het invoeren van de denkbeeldige getaleenheid
Voer het volgende in voor de denkbeeldige getaleenheid : „¥
U ziet dat het getal i als het gerangschikte paar (0,1) wordt ingevoerd als het
CAS is ingesteld op de modus APPROX. In de modus EXACT wordt de
denkbeeldige getaleenheid ingevoerd als i.
Opmerkingen:
Het product van twee getallen wordt weergegeven door: (x
1
+iy
1
)(x
2
+iy
2
) =
(x
1
x
2
- y
1
y
2
) + i (x
1
y
2
+ x
2
y
1
).
De deling van twee complexe getallen wordt bereikt door het vermenigvuldigen
van de teller en de noemer door de complex geconjugeerde van de noemer,
dus
De inverse functie INV (geactiveerd met de toets Y) wordt gedefinieerd als
2
2
2
2
2112
2
2
2
2
2121
22
22
22
11
22
11
yx
yxyx
i
yx
yyxx
iyx
iyx
iyx
iyx
iyx
iyx
+
+
+
+
=
+
+
=
+
+
2222
11
yx
y
i
yx
x
iyx
iyx
iyxiyx
+
+
+
=
+
=
+
172


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