That is your pi by 2 N naught is the spread and into 1 because this is the first component of that. Second one will be pi by 2 N naught into 2 pi by 2 pi by 2 N naught into 3 so on and so forth and the last one will be pi by 2 N naught into N naught, ok.
यहाँ स्प्रेड है,और पहला टर्म है , दूसरा टर्म है , और इसी तरह आखरी टर्म है।