Sum
If A = {a, {a, b}}, write all the subsets of A
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Solution
A = {a, {a, b}}
Subset of A are Ø, {a}, {a, b}, {a, {a, b}} or { }, {a}, {a, b, {a, {a, b}}
P(A) = {Ø, {a}, {a, b}, {a, {a, b}} or {{ }, {a}, {a, b, {a, {a, b}}
Concept: Types of Sets
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