Chapter 2 - Set Theory - Chapter Summary, Review, and Test - Review Exercises - Page 109: 45

U = {1,2,3,4,5,6,7,8,9}

The set U represents all the elements common of set 'U'. From the given Venn diagram the regions I, II, III, IV represents the set 'U'. So, The elements of set U are 1,2,3,4,5,6,7,8,9. Therefor U = {1,2,3,4,5,6,7,8,9} Therefor, (A∩B') = {6}