Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    Which value among\[\sqrt[3]{5},\,\sqrt[4]{6},\,\sqrt[6]{12},\,\sqrt[12]{276}\]is the largest?

    A)  \[\sqrt[3]{5}\]               

    B)  \[\sqrt[4]{6}\]

    C)  \[\sqrt[6]{12}\]             

    D)  \[\sqrt[12]{276}\]

    Correct Answer: A

    Solution :

    [a] \[\sqrt[3]{5}={{5}^{\frac{1}{3}\times 12}}={{5}^{4}}=625\] \[\sqrt[4]{6}={{6}^{\frac{1}{4}\times 12}}={{6}^{3}}=216\] \[\sqrt[6]{12}={{12}^{\frac{1}{6}\times 12}}={{12}^{2}}=144\] \[\sqrt[12]{276}={{276}^{\frac{1}{12}\times 12}}={{276}^{1}}=276\] So, option [a] is correct.


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