Which geometric formula would find the n th term for the sequence 7 , 14 , 28 , 56 ?

Each term is twice the term before it, so the sequence is geometric with first term 7 and common ratio 2. A geometric sequence has the nth-term formula aₙ = a₁rⁿ⁻¹, giving aₙ = 7 × 2ⁿ⁻¹. This is choice A, the formula that produces 7, 14, 28, and 56.

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