state gov UP Police ASI Mock Test 2023 - 24 Quantitative Aptitude Number System Rational or Irrational Numbers
যদি \(x = \sqrt {\frac{{\sqrt {10} + 1}}{{\sqrt {10} - 1}}}\) হয়, তাহলে (x 2 - x - 1) এর মান হল –
1
\(- \frac{{\sqrt {10} + 1}}{8}\)
2
\(- \frac{{\sqrt {10} - 1}}{8}\)
3
\(- \frac{{\sqrt {10} + 1}}{9}\)
4
\(- \frac{{\sqrt {10} + 2}}{9}\)