Question

If a = √2 +1, then find the value of a – 1/a.​

Answer 1

Answer:

2

Step-by-step explanation:

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Answer 2

Answer:

2 is the answer of the question

Step-by-step explanation:

$= > a - \frac{1}{a} \\ = > ( \sqrt{2} + 1) - \frac{1}{( \sqrt{2} + 1) } \\ = > \frac{ - 1 + 2 + 1 + 2 \sqrt{2} }{ \sqrt{2} + 1} \\ = > \frac{2 + 2 \sqrt{2} }{ \sqrt{2} + 1 } \\ = > \frac{2( \sqrt{2} + 1) }{ \sqrt{2} + 1} \\ = > 2$