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

1. stgreen

empty set

2. hartnn

∩ means elements which are "common" to those sets.

3. hartnn

which elements are common to A and B ?

4. inkyvoyd

∩ is called the intersection. Think of it as the center of a venn diagram.

5. aminita

the options they give me are... { } {…, −3, −2, −1, 1, 2, 3, …} {1, 2, 3, 4, …} {…−3, −2, −1}

6. inkyvoyd

Look at what hartnn and I have said. What do you think the answer is?

7. stgreen

@aminita first one is true....since there is nothing common between these two sets you see

8. aminita

yes that is the answer choice i picked but it said it was wrong...

9. aminita

there are no common integers that will fit within bity of these sets that is why i picked it but my teacher marked it wrong :/

10. inkyvoyd

take a screenshot of the problem and contact your teacher.

11. stgreen

yeah your teacher is just violating the very basic concept of sets

12. aminita

okay thank you all for your help peeps!;)

13. stgreen

welcom kid

14. aminita

(y)