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If (9^nx3^2x(3^(-n/2))^(-2)-(27)^n)/(3^...

If `(9^nx3^2x(3^(-n/2))^(-2)-(27)^n)/(3^(3m)x2^3)=1/(27),` Prove that `m-n=1.`

A

`-1`

B

1

C

2

D

`-2`

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The correct Answer is:
B
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