Chapter 2 - Set Theory - Chapter Summary, Review, and Test - Review Exercises - Page 109: 42

(A∩B)' = {1,2,3,6,7,8,9}

The set (A∩B)' represents all the elements of set 'U' which are not there in set A∩B. From the given Venn diagram the region I, III, IV represents the set (A∩B)'. So, The elements of set (A∩B)' are 1,2,3,6,7,8,9. Therefor, (A∩B)' = {1,2,3,6,7,8,9}