${{{{2.3}^{n + 1}} + {{7.3}^{n - 1}}} \over {{3^{n + 2}} - 2{{(1/3)}^{l - n}}}} = $

  • A

    $1$

  • B

    $3$

  • C

    $-1$

  • D

    $0$

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  • [KVPY 2012]

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