Question

The number of subsets of the power set of set A = {φ, {φ}, {{φ}} } is


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Answer 1

Answer:

A={φ, {φ}, {{φ}} }

P(A)={{φ}, {{φ}}, {{{φ}}}, {φ, {φ}}, {φ, {{φ}}}, {{φ}, {{φ}}}, {φ, {φ}, {{φ}}}, φ}

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