9th Class Mathematics Related to Competitive Exam Question Bank Logarithms

  • question_answer
    \[\log \mathbf{l60}\]is equal to:

    A)  \[2\,log2+3\,log3\]        

    B)  \[3\,log2+2\,log3\]

    C)  \[3\,log2+2\,log3-log5\]           

    D)  \[5\,log2+log5\]

    Correct Answer: D

    Solution :

    (d): \[160=2\times 2\times 2\times 2\times 2\times 5\] So, So, \[log160=log({{2}^{5}}\times 5)=log{{2}^{5}}+log5\] \[5log2+log5\]


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