CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2005

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

    A)  \[\frac{{{a}^{x}}}{\log \,\,ae}+c\]                            

    B)  \[\frac{{{e}^{x}}}{1+{{\log }_{e}}a}+c\]

    C)  \[{{(ae)}^{x}}+c\]           

    D)         \[\frac{{{(ae)}^{x}}}{{{\log }_{e}}ae}+c\]

    E)  \[\frac{{{a}^{x}}{{e}^{x}}}{{{\log }_{x}}a}+c\]

    Correct Answer: D

    Solution :

    Let \[I=\int{{{e}^{x\log a.{{e}^{x}}}}}dx\] \[=\int{{{a}^{x}}.{{e}^{x}}}dx=\int{{{(ae)}^{x}}}dx\] \[=\frac{{{(ae)}^{x}}}{{{\log }_{e}}ae}+c\]


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