Question

Construct the appropriate number sets with the given information. Use the sets to match the following:

Given

a = ∅
b = B
c = then A ∪ B = B
d = A
e = then A ∩ B = B
1. If A B b
2. If B A e
3. A ∪ ∅ c
4. A ∩ ∅ a
5. B ∪ ∅ d

Answer 1

whats the u and the n symbol there?