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If f(z) = C0 + C1z-1 then oint limits text unit...

This question belongs to Engineering Maths Complex Variable
Complex Variable
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If f(z) = C0 + C1z-1, then $$\oint\limits_{{\text{unit circle}}} {\frac{{1 + {\text{f}}\left( {\text{z}} \right)}}{{\text{z}}}{\text{dz}}} $$    is given by

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Correct Answer: Option D
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