Solution Found!
Explain w by the set A is countable if and only if
Chapter 2, Problem 13E(choose chapter or problem)
QUESTION:
Problem 13E
Explain w by the set A is countable if and only if |A| ≤ |Z+|.
Questions & Answers
QUESTION:
Problem 13E
Explain w by the set A is countable if and only if |A| ≤ |Z+|.
ANSWER:
SOLUTION
We need to show that a set A is countable if and only if
Step 1
By definition, A set is called countable if it is finite or it has the same cardinality as the set of positive integers.