Answer:
Step-by-step explanation:
The choices appear to have been written incorrectly. They should be
7(3)ⁿ⁻¹
3(7)ⁿ⁻¹
3(7)ⁿ⁺¹
common ratio r = a₂/a₁ = 7
nth term = a₁rⁿ⁻¹ = 3(7)ⁿ⁻¹
