Question

List the first 5 terms of the geometric sequence given a₁ = 1 and r = 3.

Answer 1

1, 3, 9, 27, 81

Explanation:

to find a term in a geometric sequence multiply the previous term by r

a₁ = 1

a₂ = a₁ × 3 = 1 × 3 = 3

a₃ = a₂ × 3 = 3 × 3 = 9

a₄ = a₃ × 3 = 9 × 3 = 27

a₅ = a₄ × 3 = 27 × 3 = 81

the first 5 terms are 1 , 3 , 9 , 27 , 81