Question

If A = {positive integers} and B = {negative integers}, what is A ∩ B?

{ }

{…, −3, −2, −1, 1, 2, 3 …}

{1, 2, 3, 4 …}

{…−3, −2, −1}

Answer 1

i always get confused on these @kathy0514

Answer 2

@jonjenkins7653

Answer 3

B. { }

You are looking for the intersection of positive integers and negative integers, that is, integers which are both positive and negative. So the answer is the null set, since there are no such integers.

Note that zero is neither positive or negative.

Answer 4

oh ok so it would be this { }

Answer 5

ya

Answer 6

ok thank you t