Question Detail
Question
The 3rd term of a geometric sequence is 9 and the 5th term is 81. What is the common ratio?
Correct Answer
Option A is the correct answer.
Detailed Explanation
a₃ = ar² = 9, a₅ = ar⁴ = 81. Dividing: r² = 9 ⇒ r = 3.
Hint
The notes indicate answer A.