Question

What would A U B be if A is 6 & B is 2? Wouldn't that be {(6,2)}? And what would A (upside down U) B be? Would it be {(6.2)} also?

Answer 1

A U B is the set A and the set B
however
A ∩ B its the common values in both sets which is none in your case

Answer 2

yes for the first one
no for the second
\[A\cap B\] =is the intersection, what is common to both
in your case there is nothing in the intersection sometimes written as \(\emptyset\)

Answer 3

So then I should just put A ∩ B= 0?

Answer 4

no its empty set ∅ or {}

Answer 5

Thanks so much :)

Answer 6

no problem

Answer 7

right, not, either \(\{\}\) or \(\emptyset\)