use the axioms for a ring to prove the following:

for all x,y,z in a ring

-1*x = -x

I can pull through if I can use the fact that 1x = x ... although I am unsure if this is allowed or not. Any help is appreciated!

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- April 13th 2009, 08:37 PMminivan15proofs using the axioms of rings
use the axioms for a ring to prove the following:

for all x,y,z in a ring

-1*x = -x

I can pull through if I can use the fact that 1x = x ... although I am unsure if this is allowed or not. Any help is appreciated! - April 13th 2009, 08:47 PMChris L T521
- April 13th 2009, 10:18 PMminivan15
it does...although the axioms for a ring never state that 1x = x. Could you show me a proof of this? Other than that it is perfectly clear, thanks