Lösung 3.2:2c
Aus Online Mathematik Brückenkurs 2
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Version vom 10:36, 11. Mär. 2009
The magnitude \displaystyle |z| of a complex number \displaystyle z is equal to the number's distance from the origin. The condition \displaystyle |z|=2 therefore says that \displaystyle z's distance from the origin should be 2, i.e. the condition gives a circle of radius 2 and centre at the origin.
