Question

Let A = {x | x < 5} and B = {x | x ≤ 7}.
Find A B.

1.{x | x < 5}

2.{x | x ≤ 5}

3.{x | x ≤ 7}

4.{x | 5 < x ≤ 7}

Answer 1

What is between A and B in the question, union or intersection?

Answer 2

I think it's the intersection

Answer 3

Does it look like a U or like an upside down U?

Answer 4

Right-side up U?

Answer 5

That is Union.
Do you understand the difference between union and intersection of two sets?