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

  • question_answer
    \[(0.5)-\frac{{{(0.5)}^{2}}}{2}+\frac{{{(0.5)}^{3}}}{3}-\frac{{{(0.5)}^{4}}}{4}+....\] [MP PET 1995]

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

    B) \[{{\log }_{10}}\frac{1}{2}\]

    C) \[{{\log }_{e}}n\,!\]

    D) \[{{\log }_{e}}\frac{1}{2}\]

    Correct Answer: A

    Solution :

    Obviously  \[0.5-\frac{{{(0.5)}^{2}}}{2}+\frac{{{(0.5)}^{3}}}{3}-....={{\log }_{e}}(1+0.5)\]\[={{\log }_{e}}\left( \frac{3}{2} \right)\].


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