Let U = {1, 2, 3, 4, 5, 6, 7}, A = {2, 4, 6}, B = {1, 2, 3, 5, 7}, and C = {1, 3, 6, 7}. Find (A B)’

Answer 1

(AB)' = null set

= every element that is not in A or B, but AB = U

there are no elements that are not in either A or B

IF by AB you meant AvB = A or B

but if you meant AB= A^B = A and B, then AB = {2} and (AB)'= {1,3,4,5,6,7}

You have it written A B as if there's a symbol missing between the A and B

if that missing symbol is v, then the solution is the null set

if that missing symbol is ^, then the solution set is {1,3,4,5,6,7}