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Session 2: Integration

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This figure shows a copy of the complex plane with unlabelled axes focused on the upper-right and lower-right quadrants. The points 1, 1 plus i, 6 plus i and 6 are labelled and marked as solid dots. 1 and 6 are on the positive real axis. 1 plus i and 6 plus i are in the upper-right quadrant. The point 1 plus i is directly above the point 1 and the point 6 plus i is directly above the point 6. The points pi over 2 and 3 pi over 2 are labelled and marked as hollow dots on the positive real axis with pi over 2 being to the right but close to the point 1 and the point 3 pi over 2 being to the left but close to the point 6. There is an unlabelled path made up of 3 joining line segments with direction arrows going from points 1 to 1 plus i then 1 plus i to 6 plus i and finally 6 plus i to 6. The entire complex plane except for the hollow dots is shaded.