RAJASTHAN ­ PET Rajasthan PET Solved Paper-2009

  • question_answer
    The value of differentiation of\[{{e}^{{{x}^{2}}}}\]w.r.t. to \[{{e}^{2x-1}}\]at\[x=1\]is

    A)  e     

    B)  0      

    C)  \[{{e}^{-1}}\]     

    D)  1

    Correct Answer: D

    Solution :

     Let\[u={{e}^{{{x}^{2}}}}\]and \[v={{e}^{2x-1}}\] On differentiating w.r.t.\[x,\]we get \[\frac{du}{dx}={{e}^{{{x}^{2}}}}.2x\] and          \[\frac{dv}{dx}={{e}^{2x-1}}(2)\] \[\therefore \] \[\frac{du}{dv}=\frac{{{e}^{{{x}^{2}}}}.2x}{{{e}^{2x-1}}.2}\] \[\Rightarrow \] \[\frac{du}{dv}=x{{e}^{{{x}^{2}}-2x+1}}\] \[\Rightarrow \] \[{{\left( \frac{du}{dv} \right)}_{x=1}}=1.{{e}^{1-2+1}}\] \[\Rightarrow \] \[\frac{du}{dv}=1\]


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