JEE Main & Advanced Mathematics Sequence & Series Question Bank Logarithmic series

  • question_answer
    The value of \[{{\log }_{3}}e-{{\log }_{9}}e+{{\log }_{27}}e....\] is equal to

    A) \[{{\log }_{3}}2\]

    B) \[{{\log }_{2}}3\]

    C) \[2{{\log }_{3}}2\] v

    D) None of the se

    Correct Answer: A

    Solution :

    \[{{\log }_{3}}e-{{\log }_{9}}e+{{\log }_{27}}e-....\]\[=\frac{1}{{{\log }_{e}}3}\left[ 1-\frac{1}{2}+\frac{1}{3}-....\infty  \right]\] \[=\frac{{{\log }_{e}}2}{{{\log }_{e}}3}={{\log }_{3}}2\].


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