Question

If A = {negative integers} and B = {integers divisible by 3}, what is A ∩ B?

{…−4, −3, −2, −1}

{ }

{…−12, −9, −6, −3}

{0}

Answer 1

we have some set A and some set B
\[A\cap B\]
^^^^every element in that must also be in A AND B
so
\[x \in A \cap B\iff x \in A \space AND \space x\in B\]

Answer 2

so which set in your answers would satisfy the property that every element in it is in both A and B?

Answer 3

@Onlyln1D ???