state gov UP Police ASI Mock Test 2023 - 24 Quantitative Aptitude Number System Rational or Irrational Numbers
If \(x = \sqrt {\frac{{\sqrt {10} + 1}}{{\sqrt {10} - 1}}}\), then the value of (x2 - x - 1) is –
1
\(- \frac{{\sqrt {10} + 1}}{8}\)
2
\(- \frac{{\sqrt {10} - 1}}{8}\)
3
\(- \frac{{\sqrt {10} + 1}}{9}\)
4
\(- \frac{{\sqrt {10} + 2}}{9}\)