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NTSE Sample Paper NTSE SAT Practice Test-13

  • question_answer
    Given that\[\sqrt{5}=2.2361\], \[\sqrt{3}=1.7321\]then the value of \[\frac{1}{\sqrt{5}-\sqrt{3}}\]is

    A) 1.98                             

    B) 1.984

    C) 1.9841    

    D)        2

    Correct Answer: C

    Solution :

    [c] \[\frac{1}{\sqrt{5}-\sqrt{3}}=\frac{\sqrt{5}+\sqrt{3}}{(\sqrt{5}+\sqrt{3})(\sqrt{5}-\sqrt{3})}\] \[=\frac{1}{2}(\sqrt{5}+\sqrt{3})\,\,\,\]  etc.       


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