3.1 Exercises

From Förberedande kurs i matematik 2

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Revision as of 10:21, 7 April 2008

 

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Övning 3.1:1

Skriv i formen \displaystyle \,a+bi\,, där \displaystyle \,a\, och \displaystyle \,b\, är reella tal

a) \displaystyle (5-2i)+(3+5i) b) \displaystyle 3i -(2-i)
c) \displaystyle i(2+3i) d) \displaystyle (3-2i)(7+5i)
e) \displaystyle (1+i)(2-i)^2 f) \displaystyle i^{\,20} + i^{\,11}