6. let s = {+ men,n e n. m (i) show that 0 is a limit point of s. (ii) if k en, show that is a limit point of s. (iii) find s' ( the derived set of s).

6. Let S = {+ meN,n e N. m (i) Show that 0 is a limit point of S. (ii) If k EN, show that is a limit point of S. (iii) Find S' ( the derived set of S). see attachment