# The Domain of a Complex Function

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For each of the functions below, describe the domain of definition that is understood:

a) f(z)=1/(z^2+1)

b) f(z)=Arg(1/z)

c) f(z)=z/(z+z bar)

d) f(z)=1/(1-|z|^2 )

https://brainmass.com/math/complex-analysis/domain-complex-function-460251

#### Solution Preview

The main idea on these is to exclude complex numbers that result in a zero denominator which is not defined. The attachment will provide rational for each of these and describe the excluded numbers geometrically on the complex plane.

a) f(z)=1/(z^2+1) In this case z^2=-1 will result in a zero denominator ...

#### Solution Summary

This solution helps go through how to find the domain of different complex functions within the context of complex analysis.

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