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

Please and thank you :)

Answer 2

\(A \cap B\) is the set of elements in both \(A\) and \(B\). Since \(A\) only contains positive integers and \(B\) only contains negative integers, and a number cannot be both positive and negative, \(A\cup B\) is the empty set {}.

Answer 3

That's what i thought, Thanks sooo much! :)

Answer 4

(Sorry - typo on the last line.)

You're welcome!

Answer 5

it is a null set

Answer 6

Thank you!:)