Question

let w={-4,-3,-2,-1}, x={-2,-1,0,1}
and y={0,1,2} find each of the following
1. w(upside down U) x
2. x(upside down U) y
3. w(upside down U) y
4.w U x
5. w U y

Answer 1

6. \[x \cup \emptyset \]

Answer 2

\[\large w \cap x\]
So for the `intersection` of the sets \(\large w\) and \(\large x\),
we want all the elements that are in BOTH \(\large w\) and \(\large x\).

Answer 3

Hmm, \(\large w\) has a -2.
\(\large x\) also has -2.

Understand how that works?
Do they share any other elements?