1 votes 1 votes If the semi-circular contour $D$ of radius $2$ is as shown in the figure, then the value of the integral $\displaystyle{}\oint_{D} \dfrac{1}{\left(s^{2}-1\right)} d s$ is $j \pi$ $-j \pi$ $-\pi$ $\pi$ Others gate2007-ec + – admin asked Sep 19, 2022 • edited Feb 24, 2023 by Lakshman Bhaiya admin 46.4k points 144 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.