Check whether the set of integers is countable or not.
The set of integers is countable. In real analysis, a set is countable if its elements can be put into one-to-one correspondence with the natural numbers (positive integers).
To demonstrate that the set of integers is countable, you can construct a bijection (one-to-one and onto function) between the set of integers and the natural numbers. One common way to
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Check whether the set of integers is countable or not.
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i).
ii).
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