Correct. What is the subset of A? ,{{ 1}},{{ 1,2}},{{ 1},{ 1,2}}

Please note that the repeated elements in the set are not counted, so {1, 1}={ 1}, {1, 2, 1}={ 1, 2}

The power set consists of all subsets of A, so the result you said is correct.

For another example, A={ 1, 2,3}

So P(A)={? ,{ 1},{2},{3},{ 1,2},{ 1,3},{2,3},[ 1,2,3}}