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

  • question_answer
    The value of \[{{a}^{b}}-{{b}^{a}},\]if \[a=3,\text{ }b=7\]is

    A)  1825                          

    B)  1840  

    C)         1844              

    D)         1850  

    Correct Answer: C

    Solution :

    \[{{a}^{b}}-{{b}^{a}}={{3}^{7}}-{{7}^{3}}=2187-343=1844\]


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