I am just trying to see if my answers are correct to this question.
a) $\mathbb N$
b) $P$($\mathbb N$)
c) $\mathbb N$
Is this correct?
2026-03-30 02:40:04.1774838404
Cardinality Question
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Your answers are correct. Finite subsets of $\mathbb N$ correspond to $\mathbb Q\cap(0,1]$ ( consider decimal expression ). Similarly infinite subsets of $\mathbb N$ correspond to $\mathbb R\cap(0,1]$ and finite sequences correspond to finite sets.