JCECE Engineering JCECE Engineering Solved Paper-2005

  • question_answer
    \[\int{{{e}^{-\log x}}}dx\]is equal to:

    A) \[{{e}^{-\log x}}+c\]

    B) \[-x{{e}^{-\log x}}+c\]

    C) \[{{e}^{\log x}}+c\]

    D) \[\log |x|+c\]

    Correct Answer: D

    Solution :

    Let\[I=\int{{{e}^{-\log x}}dx}\]         \[=\int{{{e}^{\log \frac{1}{x}}}}dx\int{\frac{1}{x}dx}\]                 \[=\log |x|+c\]


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