PROOF 160
Prove.
The product rule and the sum rule of counting
On finite sets.
Definition D1
For a finite set A, |A| = m means that there is a bijection from A to {1, 2, …, m}.
Proof.
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PROOF 160
The product rule and the sum rule of counting
On finite sets.
Definition D1
For a finite set A, |A| = m means that there is a bijection from A to {1, 2, …, m}.
Proof.
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