Question

Find power set of {1{2,3},4}.

Answer 1

subsets with 0 elements: 0 (the empty set) subsets with 1 element: {1}, {2}, {3}, {4} subsets with 2 elements: {1,2}, {1,3}, {1,4}, {2,3}, {2,4}, {3,4} subsets with 3 elements: {1,2,3}, {1,2,4}, {1,3,4} {2,3,4}