मान ज्ञात कीजिए: $\frac{2 \cdot 3^{n+1} + 7 \cdot 3^{n-1}}{3^{n+2} - 2 \cdot (1/3)^{1-n}}$

  • A
    $1$
  • B
    $3$
  • C
    $-1$
  • D
    $0$

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