Question

If A = {positive integers} and B = {…,−4, −3, −2, −1} what is A ∩ B?

{ }

{…, −3, −2, −1, 1, 2, 3, …}

{1, 2, 3, 4, …}

{…−3, −2, −1}

Answer 1

So, what is in \(B\) and is a positive integer; in other words, what belongs to the set \(\{A\cap B\}\)?

Answer 2

non?

Answer 3

Sounds like nothing so the union might be the set \(\emptyset\).

Answer 4

(: