Let X be the set comprising all numbers of the following two types: • Natural numbers; • Natural number multiples of meaning 1, 2T, 37, and so on. (To clarify, X includes numbers like 39 and numbers like 107.) Is X a countable set? If yes, what is a one-to-one correspondence that shows it? If no, why not?

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4. Let X be the set comprising all numbers of the following two types:
• Natural numbers;
• Natural number multiples of
meaning 7, 2T, 3™, and so on.
(To clarify, X includes numbers like 39 and numbers like 107.) Is X a countable set?
If
what is a one-to-one correspondence that shows it? If no, why not?
yes,
1
dinalitu than
Transcribed Image Text:uestiontext/134095/1/273621/review2.pdf du y 1 / 4 +| 日の 100% 4. Let X be the set comprising all numbers of the following two types: • Natural numbers; • Natural number multiples of meaning 7, 2T, 3™, and so on. (To clarify, X includes numbers like 39 and numbers like 107.) Is X a countable set? If what is a one-to-one correspondence that shows it? If no, why not? yes, 1 dinalitu than
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