Posted by **Blake** on Friday, September 11, 2009 at 1:11am.

Help, I am stuck:

Find (A �� B) �� C, given A = {s, e, t}, B = {m, e}, and C = {f, r, e, e}.

A) { }

B) {s, e, t, m, f, r}

C) {e}

D) {s, e, t, m, e, f, r, e, e}

- Math -
**MathMate**, Friday, September 11, 2009 at 8:03am
Sorry, we are unable to decode the special characters replaced by ? under Western encoding. If it is ∪, you type "& c u p ;" without the intevening spaces nor the quotes, and if it is ∩, you type "& c a p ;".

If all else fails, you simply write "union" or "intersection". At least we will know what the question is.

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