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Determine whether each of these sets is finite, countably infinite, or uncountable. For those that are...

Determine whether each of these sets is finite, countably infinite, or uncountable. For those that are countably infinite, exhibit a one-to-one correspondence between the set of positive integers and that set. For those that are finite or uncountable, explain your reasoning.

a. integers that are divisible by 7 or divisible by 10

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