KVPY Sample Paper KVPY Stream-SX Model Paper-24

  • question_answer
    \[\underset{x\to \infty }{\mathop{\text{Limit}}}\,\frac{{{x}^{n}}}{{{e}^{x}}}=0\](n integer) for -

    A) No value of n

    B) All values of n

    C) Only negative values of n

    D) Only positive values of n

    Correct Answer: B

    Solution :

    \[\underset{n\to \infty }{\mathop{Lim}}\,\,\,\frac{{{x}^{n}}}{{{e}^{x}}}=0\]is not an indeterminate form for \[n\le 0\]\[\Rightarrow \] Limit is equal to zero for n>0 \[\underset{n\to \infty }{\mathop{Lim}}\,\,\,\frac{{{x}^{n}}}{{{e}^{x}}}=\underset{n\to \infty }{\mathop{Lim}}\,\frac{n\,\,(n-1)\,\,(n-2)......1}{{{e}^{x}}}=0\]


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