engineering recuitment GATE ECE 2023-24 Test Series Engineering Mathematics Complex Variables Residue Theorem
The value of the contour integral \(\frac{1}{{2\;\pi j}}\oint {\left( {z + \frac{1}{z}} \right)^2}dz\) evaluated over the unit circle |z| = 1 is _______.
Enter numerical value using the virtual keypad. Round off where necessary.