Question

Let U = {7, 14, 21, 28, 35, 42, 49, 56} and A = {21, 28, 35, 49}. Find A'.

Answer 1

well, A' is the complement of A, so: A' = U-A

Answer 2

A' basically means all the elements of U not in A. So remove all the elements of U which are present in A. Thus the remaining set will be A'

Answer 3

thank you amistre64 & pratyush5.