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7th Class Mathematics Exponents and Power Question Bank Exponents and Power

  • question_answer
    The value of \[\frac{{{x}^{-4}}\times {{y}^{-6}}}{{{x}^{-16}}\times {{y}^{-7}}}\]

    A) \[{{x}^{-1}}\times {{y}^{-1}}\]                     

    B) \[{{x}^{-1}}\text{ }{{y}^{-1}}\]

    C) \[\frac{1}{{{x}^{12}}y}\]                               

    D) \[{{x}^{12}}y\]

    Correct Answer: D

    Solution :

    (d) \[\frac{{{x}^{-4}}\times {{y}^{-6}}}{{{x}^{-16}}\times {{y}^{-7}}}={{x}^{-4+16}}\times {{y}^{-6+7}}={{x}^{12}}{{y}^{1}}={{x}^{12}}y\]


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