# Identify the singularity

## Homework Statement

Identify the singularity of f(z)= 1-e^z/1+e^z at z= infinity

How shud i start

## Answers and Replies

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CompuChip
Science Advisor
Homework Helper
You can convert the singularity at infinity to one at zero by considering
$g(z) = f(1 / z)$
Then apply the same strategy as here