Question: How do I prove this? Theorem 1.6. Let 2N denote the even positive integers {2, 4, 6, ...}. Then 2N has the same cardinality as

How do I prove this?

How do I prove this? Theorem 1.6. Let 2N denote the even

Theorem 1.6. Let 2N denote the even positive integers {2, 4, 6, ...}. Then 2N has the same cardinality as N, that is, |2N| = |N|

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