Geometric Sequence Formula Quiz (5 Questions)

1. Find the 4th term if a₁ = 2 and r = 3

2. Write the formula for a geometric sequence with a₁ = 5 and r = 1/2

3. Find the 6th term of: 1, 3, 9, …

4. What happens to the sequence if r is negative?

5. Which grows faster: arithmetic or geometric sequences?

Answer Key

1. 54

2. aₙ = 5 · (1/2)ⁿ⁻¹

3. 243

4. The terms alternate signs

5. Geometric sequences