Which formula can be used to find the n th term in a geometric sequence where A sub 1 is equal to 3 and r is equal to 2 ?

The nth term of a geometric sequence is given by Aₙ = A₁rⁿ⁻¹. Substituting A₁ = 3 and r = 2 gives Aₙ = 3 × 2ⁿ⁻¹, which is choice C. The expressions with n − 1 added or multiplied linearly describe arithmetic patterns, not geometric ones.

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