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

  • question_answer
    The value of \[\left( \frac{{{a}^{-2}}\times {{b}^{-3}}}{{{a}^{-3}}\times {{b}^{-4}}} \right)\] is ________.

    A)  \[{{a}^{-1}}\times b\]                    

    B)  \[a\times {{b}^{-1}}\]        

    C)         \[{{(ab)}^{-1}}\]           

    D)         \[ab\]              

    Correct Answer: D

    Solution :

    \[\left( \frac{{{a}^{-2}}\times {{b}^{-3}}}{{{a}^{-3}}\times {{b}^{-4}}} \right)=({{a}^{-2+3}}\times {{b}^{-3\times 4}})=a\times b=ab\]


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