Question

What are the explicit equation and domain for a geometric sequence with a first term of 3 and a second term of -9? (5 points)

an = 3(-12)n - 1; all integers where n ≥ 1
an = 3(-12)n - 1; all integers where n ≥ 0
an = 3(-3)n - 1; all integers where n ≥ 1
an = 3(-3)n - 1; all integers where n ≥ 0

Answer 1

@mathmale

Answer 2

I know I can already eliminate the first two answers

Answer 3

@mathmale @zepdrix @tejasvir

Answer 4

an = 3* ((-3)^(n - 1)); all integers where n ≥ 1

Answer 5

@matricked are you 100% sure?