Let $A = {1, 2, 3}$ . Then find the power set of A

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Solution

Subset of A are: $ϕ, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}$ and ${1, 2, 3}$ .
Hence, total number of subset are $= 2^{3} = 8$ .
Hence, $P (A) = {ϕ, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}}$ .

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