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WannaBe22
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Homework Statement
A function f is analytic in the whole complex plane beside 4 poles.
We know that -1,2,1+5i are poles of f and that f gets only real values in (-1,2).
Find the fourth pole of f and show that f is a real-valued function for every real z which isn't a pole.
Homework Equations
The Attempt at a Solution
I've tried using the symmetry principle but without any success..
Help is needed
Thanks !