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Integration of the complex function text f left( text z right)...

This question belongs to Engineering Maths Complex Variable
Complex Variable
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Integration of the complex function $${\text{f}}\left( {\text{z}} \right) = \frac{{{{\text{z}}^2}}}{{{{\text{z}}^2} - 1}},$$    in the counterclockwise direction, around |z - 1| = 1, is

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Correct Answer: Option C
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