Given three setsA, B, and C, setX = (A-B) U (B-C) U (C-A)and

Y = (A∩B∩C) complement C. Prove thatXis subset ofY. IsYnecessarily a subset ofX? If yes, prove it. If no, why???

Can someone help me out here...

:) Thanks

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- March 7th 2008, 04:35 PMLeileiUrgent HELP plz.....
Given three sets

**A, B, and C**, set**X = (A-B) U (B-C) U (C-A)**and

**Y = (A∩B∩C) complement C**. Prove that**X**is subset of**Y**. Is**Y**necessarily a subset of**X**? If yes, prove it. If no, why???

Can someone help me out here...

:) Thanks - March 7th 2008, 04:53 PMPlato
Look at this:

- March 7th 2008, 07:28 PMLeilei
yea I got this... but I don't know how to approach to the prove..

:(