Posted by **Mary ** on Sunday, May 4, 2014 at 11:52pm.

Let U= 1,2,3,4,5,6,7,8,9,10

{12345 n 34567

Thank you

- algebra -
**Steve**, Monday, May 5, 2014 at 12:05am
which elements are in both sets?

{3,4,5}

Don't get sloppy with your notation, or things will get confusing as the problems get more involved. Your second line is just nonsense, but it's easy to figure out what you meant in this case. (I think!)

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