Question

Write down all the subsets of the following sets: 

(i) {a} 

(ii) {a, b} 

(iii) {1, 2, 3} 

(iv) Φ 

Answer 1

(i) The subsets of {a} are Φ and {a}.
(ii) The subsets of {a, b} are Φ, {a}, {b}, and {a, b}.
(iii) The subsets of {1, 2, 3} are Φ, {1}, {2}, {3}, {1, 2}, {2, 3}, {1, 3}
 and {1, 2, 3}
(iv) The only subset of Φ is Φ.