Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-27

  • question_answer
    The greatest of\[\sqrt{2},\sqrt[6]{3},\sqrt[3]{4},\sqrt[4]{5}\]  is

    A)  \[\sqrt{2}\]                   

    B)  \[\sqrt[6]{3}\]

    C)  \[\sqrt[3]{4}\]               

    D)  \[\sqrt[4]{5}\]

    Correct Answer: C

    Solution :

    LCM of 2, 6, 3, 4 = 12 \[\therefore \]      \[\sqrt{2}=\sqrt[12]{{{2}^{6}}}=\sqrt[12]{64}\] \[\sqrt[6]{3}=\sqrt[12]{{{3}^{2}}}=\sqrt[12]{9}\] \[\sqrt[3]{4}=\sqrt[12]{{{4}^{4}}}=\sqrt[12]{256}\] \[\sqrt[4]{5}=\sqrt[12]{{{5}^{3}}}=\sqrt[12]{125}\]             Clearly,\[\sqrt[12]{9}<\sqrt[12]{64}<\sqrt[12]{125}<\sqrt[12]{256}\] \[\therefore \]      \[\sqrt[6]{3}<\sqrt{2}<\sqrt[4]{5}<\sqrt[3]{4}\]


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