The power set of set A

Question:

The power set of set A = {1, 2} is ____________.

Solution:

Let A = {1, 2}

Then number of subject of A are 22 = 4

i.e. ϕ, {1}, {2}, {1, 2}

∴ P(A) = {{1}, {2}, ϕ, {1, 2}}

i.e P(A) = {ϕ, {1}, {2}, {1, 2}}

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