Prove that .

*Proof.*On the one hand, by Axiom 4, we have,

On the other hand, since is the additive inverse of 0, we have,

Therefore,

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Stumbling Robot

A Fraction of a Dot
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Tag: Inverses

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Additive identity is its own inverse

* Proof. * On the one hand, by Axiom 4, we have,

Prove that .

On the other hand, since is the additive inverse of 0, we have,

Therefore,