# Warm-Up Exercise 16

## Due 12:15 pm, Wed 3 Oct 2012

Physics 123, Fall 2012

Reading assignment: PpP 1.1-1.4

What is the complex conjugate of (1+3*i*)/(4-5*i*)?

(1-3i)/(4+5i)

Consider the collection of all points in the complex plane that have the same
magnitude--for the sake of discussion let's say the magnitude is 5. What's
special about this group of points?

They form a circle with radius 5. See for example Fig. 1.1 in PpP.

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