## Prove that $X\triangle\emptyset=X$

I’m working on my proofs involving sets, though this one is not a homework problem, so if you wish to provide your own example, so be it. I am working on exercise 3.3.14 (1) in Bloch’s Proofs and Fundamentals. It asks me to prove that $X\triangle \emptyset=X$. The following is what I have so far … Read more