Hi there,

I have to prove using Element Chasing that (A delta B) delta C = A delta ( B delta C)

I have the Venn drawn, and was told to start with:

let x be an element of (A delta B) delta C

if x is an element of (A delta B) union(and) C but not in x element (A delta B) intersection(or) C

I am not just sure really where to go next in the proof.

The help would be ever so appreciated.