Discrete Mathematics help

Prove ((A ⊕ B) ⊕ B) ≡ A and ((A ↔ B) ↔ B) ≡ A
not sure how to go about it, any help appreciated thanks

Question

Discrete Mathematics help

Prove ((A ⊕ B) ⊕ B) ≡ A and ((A ↔ B) ↔ B) ≡ A
not sure how to go about it, any help appreciated thanks

retireed · Answer

I did it wrong.  Need to re-start, I thought that was the exclusive OR symbol.

drewkatski · Answer

It is!

drewkatski · Answer

Don't restart it is the xor symbol (or meant to be atleast)

retireed · Answer

Is it?  When I worked it out it looked wrong, so let's do both to see which one is correct.  If I worked it out as a exclusive AND it worked out correct.

I will go back into the draw function.

retireed · Answer

|dw:1474064804323:dw|

retireed · Answer

I found my Discrete text book from the early 80's and confirmed the symbol is an EXOR...|dw:1474066266550:dw|