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81^-2 / 729^1-n = 9^ 2n
= 3^-8 * 3^6-6n = 3^4n
=3^ -6n-2 =3^4n
Since bases are same, powers are equated.
Therefore, -2= 4n + 6n
=> n = - 2/10
=> n = - 0.2 (Ans.)
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