I need to show my group is closed under *, and I'm happy with my proof that all of the possible outcomes are rational numbers. So now I need to show that 1 is not a possible outcome. Is my proof of this acceptable?

Assume

Therefore,

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- December 13th 2011, 04:17 PMbeebeProving 1 isn't in my group

I need to show my group is closed under *, and I'm happy with my proof that all of the possible outcomes are rational numbers. So now I need to show that 1 is not a possible outcome. Is my proof of this acceptable?

Assume

Therefore, - December 13th 2011, 08:11 PMAmerRe: Proving 1 isn't in my group