Answer:

Step-by-step explanation:
For a set D, the notation D' means the complement of set D.
We have, (B ∪ C) which means the union of sets B and C. Then:

Then the complement is everything outside (B ∪ C):

Finally, the symbol ∩ means the intersection, this is the elements that are shared with (B ∪ C)' and A:
![A\operatorname{\cap}(B\cup C)^(\prime)=\lbrace f\rbrace]()