diadiamond14 diadiamond14

26-11-2017
Mathematics

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x + y is rational, must x and y each be rational

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26-11-2017

Yes because x and y must be integers

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MathisLif3 MathisLif3

26-11-2017

The rationals are closed under addition, so if x,y are rational then x+y must be rational since Q is a group under addition.

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