Question: For m 0, let Nm = {(a1, . . . , am) : a1, . . . , am N} to consist of m-tuples of

For m 0, let Nm = {(a1, . . . , am) : a1, . . . , am N} to consist of m-tuples of natural numbers. Define N = m0 Nm to consist of arbitrary but finite-length tuples of natural numbers. Is N countable or uncountable? Prove your

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