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Let $C$ be the counter-clockwise oriented circle of radius $\frac{1}{2}$ centred at $i=\sqrt{-1}$. Then the value of the contourintegral $\oint_{C} \frac{d z}{z^{4}-1}$ is

1. $-\pi / 2$

2. $\pi / 2$

3. $-\pi$

4. $\pi$
in Complex Analysis by Expert | 46 views

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