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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-24

  • question_answer
    If\[{{2}^{2x+4}}={{16}^{x}},\]then\[{{x}^{3}}\]equal to

    A)  2                    

    B)  4

    C)  8        

    D)  16

    Correct Answer: C

    Solution :

    \[{{2}^{2x+4}}={{({{2}^{4}})}^{x}}={{2}^{4x}}\] \[\Rightarrow \]\[2x+4=4x\Rightarrow 2x=4\] \[\therefore \,\,\]  \[{{x}^{3}}={{2}^{3}}=8\]


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