railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Number System Rational or Irrational Numbers
हल कीजिए: \(\frac{{\sqrt 5 \, - \,\sqrt 3 }}{{\sqrt 5 \, + \,\sqrt 3 }}\, - \,\frac{{\sqrt 5 \, + \,\sqrt 3 }}{{\sqrt 5 \, - \,\sqrt 3 }}\)
1
\(- 2\sqrt {15} \)
2
\( - \frac{{17}}{4}\)
3
-1
4
\(2\sqrt {15} \)