Komplexe Zahlen/Einfache Rechenbeispiele/1/Aufgabe

a) Berechne

(4-7{\mathrm {i} })(5+3{\mathrm {i} }).

b) Bestimme das inverse Element ${}z^{-1}$ zu ${}z=3+4{\mathrm {i} }$ .

c) Welchen Abstand hat

{}z^{-1}

aus Teil (b) zum Nullpunkt?

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