Let us take the set A = {1, 2}

Let us find all the subsets of A

We know from property of subsets that

- Empty set is the subset of all sets
- Every set is a subset of itself

So, subsets of A will be

∅,

{1}, {2},

{1, 2}

Power set is the
**
set of all subsets.
**

So, we write power set of A as

P(A) = {∅, {1}, {2}, {1, 2}}