17. If A= 1,3,5,7,9 and B= 2,4,6,8 what is the intersection of set A and B? __ 18. Acap B= 19. Acup B= 20. A^C= __ 21. B^C= __

17. The intersection of set A and B is the set of elements that are common to both A and B. In this case, there are no common elements between set A and B. Therefore, the intersection of set A and B is an empty set, denoted as .18. 19. The union of set A and B is the set of all elements that are in A, B, or both. In this case, the union of set A and B includes all the elements from both sets. Therefore, the union of set A and B is .20. The complement of set A, denoted as , is the set of all elements that are not in A. In this case, since A contains the elements , the complement of A includes all the elements that are not in A. Therefore, .21. The complement of set B, denoted as , is the set of all elements that are not in B. In this case, since B contains the elements , the complement of B includes all the elements that are not in B. Therefore, .