Complete the recursive formula of the geometric sequence 27,−9,3,−1,

Question

asked Jun 28, 2022 163k views

1 Answer

Joy · Answer 1 · 2022-07-02T11:27:46+0000

Explanation:

a1 = 27

r = -9/27 = -⅓

the formula :

an = a1. r^(n-1)

= 27. (-⅓)^(n-1)

= 3³(-3`¹)^(n-1)

= 3³(-3)^(1-n)