Hi,

I have two sets:-

A = {3, 4, 5, 6, 9} and B = {3, 5, 7, 8}

I have figured out that AnB = 5 as '5' appears in both sets.

What I am now trying to do is work out:-

AuB with a bar over the A

but don't know what I am looking for.

If anyone can offer me advice on this it will be greatly appreciated.

Thanks!