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How many elements has P(A) , if A = ϕ? |
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Answer» We know that if A is a set with m elements i.e., n(A) = m, then, n[P(A)] = 2m. If A = ϕ, then n(A) = 0 ∴n[P(A)] = 2o = 1 Hence, P(A) has one element. |
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