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SSC Sample Paper SSC (Group-C) Sample Test Paper-7

  • question_answer
    If \[\sqrt{{{2}^{x}}}=256,\] then the value of x is

    A)  14                

    B)       16

    C)  18                

    D)       20

    Correct Answer: B

    Solution :

     \[\sqrt{{{2}^{x}}}=256\] \[\Rightarrow \]            \[{{2}^{\frac{x}{2}}}={{2}^{8}}\] \[\Rightarrow \]            \[\frac{x}{2}=8\] \[\Rightarrow \]            \[x=16\]


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