Question

Given that u = {1,2,3,4,5,6,7,8,9}, A ={2,3,4,5} and B= {4,5,7,8}, list the following sets:
i) Au (A1nB)
ii) Bu (A1n B)
iii) Au (AnB1)
iv) B1u (AnB1)
v) A u(A1nB1)

Answer 1

usually if you don't get an answer to your question the reason might be that your notation is not understood, or the question is too ambiguous.

I am trying to guess that than you are using "u" to stand for union and "n" to stand for intersection?

But what is A1 ? Is it supposed to say A' or not(A) ?

Answer 2

Yes "U" stand for union "n" stand for intersection. The A1 is supposed to A'.