Is the topic as shown in the pics needed for jam physics?

yahh it comes sometimes but this topic has more weightage when you will do contour integration and contour is not a part of iit jam physics but it's very important for jest and tif...

yes, roots of unity are important

complex numbers is not a part of syllabus.

yes dear roots of unity are important topics s should do it..... it's important for csir net also..so do must