Your proof is not correct. You need to keep in mind that we are dealing in additive notation, so the inverse must be expressed in additive notation (i.e. )
Your proof is not correct. You need to keep in mind that we are dealing in additive notation, so the inverse must be expressed in additive notation (i.e. )
It should be
Does this make sense?
Hmm kinda but i dont know of additive notation.
The identity law states -a + a = 1
so shouldnt it be 1+b = 1+c