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8th Class Mathematics Exponents and Power Question Bank Exponents and Powers

  • question_answer
    Find the value of n if \[\frac{{{2}^{n}}\times {{2}^{6}}}{{{2}^{-3}}}={{2}^{18}}\]

    A)  7                    

    B)  8            

    C)  9   

    D)  10

    Correct Answer: C

    Solution :

    (c) \[\frac{{{2}^{n}}\times {{2}^{6}}}{{{2}^{-3}}}={{2}^{18}}\,\,\,\,\,\,\,\,{{2}^{N+6+3}}={{2}^{18}}\] \[=n+9=18=n=9\].      


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