If null set/ empty set is equal to A' (A complement), then is A equal to the Universal set? Please give reason.

Question

Maths-related (Sets)

Answer 1

you can illustrate this by a simple Venn diagram, with a circle for set A within the universal set's rectangle, U.

 

If there are no elements in A', that means the outside of circle A contains nothing. Therefore whatever is in A is in the Universal set under consideration for the particular set A.