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Show that (3+square root of 2)^2/3 does not represent a rational number.

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Show that (3+square root of 2)^2/3 does not represent a rational number.

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It is shown that (3+square root of 2)^2/3 does not represent a rational number.

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Lets assume that a= (3+ √2)2/3

a = 3√ (3+√2)2

a3= ...

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