Question

if S={ 1 2 3 4 }and A= {1,2} write down the Sigma field generated by A. if B= { 3 } what is the Sigma field generated by A and B. write down the set of subsets of S and show that it is a sigma field​

Answer 1

Answer:

the subsets of A are (1),(2),( ) and the subsets of B are (3) ( )