If A={ϕ,{ϕ}} then the power set of A is

If A={ϕ,{ϕ}} then the power set of A is

  1. A

    A

  2. B

    {ϕ,{ϕ},A}

  3. C

    {ϕ,{ϕ},{{ϕ}},A}

  4. D

    None of these

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    Solution:

    we have, A={ϕ,{ϕ}}

    Subset of set A are ϕ,{ϕ},{{ϕ}},{ϕ,{ϕ}}
    .'. Power set of A i.e.

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

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