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GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
If the semi-circular contour D of radius 2 is as shown in the figure, then the value of the integral $$\oint\limits_D {{1 \over {{s^2} - 1}}} ds$$ is GATE ECE 2007 Engineering Mathematics - Complex Variable Question 26 English
A
$$i\pi $$
B
$$ - i\pi $$
C
$$ - \pi $$
D
$$ \pi $$
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