Question

If a = 2 + √3, then a + 1 /a = ?

Answer 1

Answer:

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Answer 2

$a = 2 + \sqrt{3} \\ a + \frac{1}{a} \\ = 2 + \sqrt{3} + \frac{1}{2 + \sqrt{3} } \\ = 2 + \sqrt{3 } + 2 - \sqrt{3} \\ = 4$