Q1- Prove that all roots of z - 5z+12= 0 lies between the circle [z] = 1 circle [z] = 2 Q2-state and prove Cauchy's integral theorem of(z)dz = 0. Q3- Show that So 1+x2 = 2 Q4- State and Prove Roche's Theorem. Q5- Evaluate by contour integration So log (1+x) dx 1+x2