Which geometric formula would find the n th term for the sequence (3)/(4),(9)/(16),(27)/(64),(81)/(256) ?

The sequence is geometric because each term is multiplied by 3/4 to get the next term: (9/16) ÷ (3/4) = 3/4. Its first term is 3/4, so the nth-term formula is aₙ = (3/4)(3/4)ⁿ⁻¹. This matches choice A.

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