Correct. What is the subset of A? , {{ 1}}, {{ 1, 2}}, {{ 1}, {1, 2}} Note that the elements in the set are not repeated, so {1, 1. Let's give another example. A={ 1, 2,3} So P(A)={? ,{ 1},{2},{3},{ 1,2},{ 1,3},{2,3},[ 1,2,3}}