Question

Show that division is not a binary operation in N nor subtraction in N.
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Answer 1

Answer:

Show that division is not a binary operation in N nor subtraction in N. –: N × N→N given by (a, b)→ a − b ∉ N (as 3 − 2 = 1 ∈ N but 2−3 = −1 ∉ N). ... Answer: Many sets that you might be familiar to are closed under certain binary operators, whereas many are not

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Answer 2

Answer:

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