Question

I'm havingtrouble with unions and intersections and complements here is the problem:

U={1,2,3,...,10}
A={1,2,3,4}
B={2,3,4}
C={2,5,6,7,8}

A' ∩ (B ∪ C')

Answer 1

A' means everything in U that is not in A so A' = {5,6,7,8,9,10}
Similarly C' = {1,3,4,9,10}
So BUC'={1,2,3,4,9,10}
Now the question is "What do A' and B U C' have in common?
The answer is {9,10}

Answer 2

Thank you, the farthest I got was C' = 1,3,4,9,10 now I can try to figure more of these out now that you have helped me, THANK YOU!

Answer 3

You're welcome.

Answer 4

Actually thats not a answer for the choice:

It says Find the following set: A' ∩ (B ∪ C')

A' ∩ (B ∪ C') = A) {1,5} , B) {6}, C) {1,2,3}, D) { }

Answer 5

I'll work through it again and see if I can find an error. The first set is the universal set, right?

Answer 6

yeah

Answer 7

http://i40.tinypic.com/1zqslmw.png

Answer 8

Well, do you see the problem?

Answer 9

yeah lmao..they changed the problem on me, sorry ill try to work this one out