# A Symmtric Difference Question

• Aug 4th 2010, 08:25 PM
akolman
A Symmtric Difference Question
I have to admit that I am completely lost on this one.

For any three sets $A, B, C,$ show that $A \bigtriangleup B = C$ if and only if $A=B \bigtriangleup C$.

• Aug 4th 2010, 11:27 PM
tonio
Quote:

Originally Posted by akolman
I have to admit that I am completely lost on this one.

For any three sets $A, B, C,$ show that $A \bigtriangleup B = C$ if and only if $A=B \bigtriangleup C$.