Math, asked by sarfcho, 11 months ago

How many elements are there in [P[P[P(a)]]] if a is an empty set?

Answers

Answered by sonam3246

Answer:

If A = { } (the empty set), then A has noelements but P (A) = { { } }, a set with one element. If A = {a}, then A has oneelement and P (A) = { { }, {a}}, a setwith two elements.

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