Your Open Question: The rational numbers are closed under the operation of takin a square root?
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Your Open Question: The rational numbers are closed under the operation of takin a square root?

[From: ] [author: ] [Date: 12-08-18] [Hit: ]
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What is a counter example for this?

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√2 is irrational. So, the rationals are not closed under the operation of square roots.
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