1.

If (3¹⁻ⁿ)/(9⁻²ⁿ) = ⅑, find n

Answer» ONG>ANSWER:

USED FORMULAE

\frac{a {}^{n} }{a {}^{m} }  =  {a}^{n - m}

\frac{1}{a {}^{n} }  =  {a}^{ - n}



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