3.2 Übungen

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===Exercise 3.2:1===
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===Übung 3.2:1===
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Given the complex numbers <math>\,z=2+i\,</math>, <math>\,w=2+3i\,</math> and <math>\,u=-1-2i\,</math>. Mark the following numbers on the complex plane:
Given the complex numbers <math>\,z=2+i\,</math>, <math>\,w=2+3i\,</math> and <math>\,u=-1-2i\,</math>. Mark the following numbers on the complex plane:
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===Exercise 3.2:2===
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===Übung 3.2:2===
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Draw the following sets in the complex number plane
Draw the following sets in the complex number plane
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===Exercise 3.2:3===
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===Übung 3.2:3===
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The complex numbers <math>\,1+i\,</math>, <math>\,3+2i\,</math> and <math>\,3i\,</math> constitute three corners of a square in the complex number plane. Determine the square's fourth corner.
The complex numbers <math>\,1+i\,</math>, <math>\,3+2i\,</math> and <math>\,3i\,</math> constitute three corners of a square in the complex number plane. Determine the square's fourth corner.
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===Exercise 3.2:4===
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===Übung 3.2:4===
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Determine the magnitude of
Determine the magnitude of
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===Exercise 3.2:5===
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===Übung 3.2:5===
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Determine the argument of
Determine the argument of
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===Exercise 3.2:6===
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===Übung 3.2:6===
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Write the following numbers in polar form
Write the following numbers in polar form

Version vom 13:24, 10. Mär. 2009

       Theory          Übungen      

Übung 3.2:1

Given the complex numbers \displaystyle \,z=2+i\,, \displaystyle \,w=2+3i\, and \displaystyle \,u=-1-2i\,. Mark the following numbers on the complex plane:

a) \displaystyle z\, and \displaystyle \,w b) \displaystyle z+u\, and \displaystyle \,z-u
c) \displaystyle 2z+w d) \displaystyle z-\overline{w}+u

Übung 3.2:2

Draw the following sets in the complex number plane

a) \displaystyle 0\le \mbox{Im}\, z \le 3 b) \displaystyle 0 \le \mbox{Re} \, z \le \mbox{Im}\, z \le 3
c) \displaystyle |z|=2 d) \displaystyle |z-1-i|=3
e) \displaystyle \mbox{Re}\, z = i + \bar z f) \displaystyle 2<|z-i|\le3

Übung 3.2:3

The complex numbers \displaystyle \,1+i\,, \displaystyle \,3+2i\, and \displaystyle \,3i\, constitute three corners of a square in the complex number plane. Determine the square's fourth corner.

Übung 3.2:4

Determine the magnitude of

a) \displaystyle 3+4i b) \displaystyle (2-i) + (5+3i)
c) \displaystyle (3-4i)(3+2i) d) \displaystyle \displaystyle\frac{3-4i}{3+2i}

Übung 3.2:5

Determine the argument of

a) \displaystyle -10 b) \displaystyle -2+2i
c) \displaystyle (\sqrt{3} +i)(1-i) d) \displaystyle \displaystyle\frac{i}{1+i}

Übung 3.2:6

Write the following numbers in polar form

a) \displaystyle 3 b) \displaystyle -11i
c) \displaystyle -4-4i d) \displaystyle \sqrt{10} + \sqrt{30}\,i
e) \displaystyle \displaystyle\frac{1+i\sqrt{3}}{1+i} f) \displaystyle \displaystyle\frac{(2+2i)(1+i\sqrt{3}\,)}{3i(\sqrt{12} -2i)}