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23 August, 12:23

Let a be a rational number and d be an irrational number. Then a + d is

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  1. 23 August, 15:46
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    Is an irrational number Why?

    Suppose that a + b is a rational number, then is of the form p/q for some p, q integers and q different to 0.

    So, b = p/q - a (That means, b is a rational number) a contradiction.
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