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Mathematics, 24.07.2021 19:10 jrsecession

A, b€ Q then (a×b) € 2) a, b€ Q then ( a-b) €
3) a, b€ Q then ( a/b ) €
4) a, b € Q then ( a+b) € ​

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A, b€ Q then (a×b) € 2) a, b€ Q then ( a-b) €
3) a, b€ Q then ( a/b ) €
4) a, b € Q th...
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