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9th Class Mathematics Related to Competitive Exam Question Bank Logarithms

  • question_answer
    The value of \[\left( \frac{1}{{{\log }_{3}}60}+\frac{1}{{{\log }_{4}}60}+\frac{1}{{{\log }_{5}}60} \right)\]  is:

    A)  0                                

    B)  1

    C)  5                                

    D)  60

    Correct Answer: B

    Solution :

    (b):Given expression \[=lo{{g}_{60}}3+lo{{g}_{60}}4+lo{{g}_{60}}5\] \[=lo{{g}_{60}}(3\times 4\times 5)=lo{{g}_{60}}60=1.\]


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