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3. Vl Ana1LinA Komplexe Zahlen 1

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Dies ist eine vollständige Vorlesungsmitschrift zur dritten Vorlesung des Moduls Analysis I und lineare Algebra für Ingenieurswissenschaften. In dieser Vorlesung wird der Zahlenraum der komplexen Zahlen eingeführt. Dabei werden die elementaren Rechenoperationen im komplexen Zahlenraum, die Gaußsche Zahlenebene, die Konjugierte und Potenzen der Zahl i erklärt.

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komplexe Zahlen Recap NEIL QS IREK
7 in IR ist 1 lösbar

i eine imaginäre Einheit
erfüllt i 1 2B i 3 3
2 3
Wirsetzen G xtyilx.y.IR Menge der komplexen
Zahlen

Vereinfachte Schreibweisen


7 0 7 ER reelle Zahl

0 3 3 rein imaginäre Zahl

2 1 Zt

3 67 3 7
Grundrechenarten in

Addition

2 3 4 5 6 8
Subtraktion


2 3 4 5 2 2

Multiplikation
siehe oben
12 3 4 5 8 10 ez es

8 22 15 7 22

Division

2 3 12 3 8 70 12 ist
4 5 at 5 16 25,2 Iti
nach 3 binFormel Es Ei
erweitern Trick

ist ein Körper
Zahlenmenge in der alle Grundrechenarten mit bekannten

Rechengesetzen möglich sind

Q R und G sind Körper in 7 und INkann bspw nichtdividiertwer

, y x yi X Yi
reelle Zahl und 20

XIE O ES 0
4 0

Potenzen derZahl i
i 1

iii
Iii Ii 1 i i i
wiederholtsich
in ist is immer
i b 14
g g g

250 250
2 B 4
i
d Potenzen
1 i i
große
durch 4 Dividieren
und aufRest
achten

Gaußsche Zahlenebene

strahl
Zahlen IR

imaginären 14
Achse 13.2
Ii 2
y 2 37 Zi
I I s

h s n strahreelle
t Achse Zahlen




Additionkomplexer Zahlen in Gaußschen Zahlen
ebene



t T t iCy ty
x ty wie bei Vektoraddition

Xz Xzty

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Uploaded on
January 30, 2023
Number of pages
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Written in
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Type
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