Question

What is the common ratio of the sequence?

-2, 6, -18, 54,...

Answer 1

the common ratio is -3

Explanation:

Answer 2

a1=-2
a2=6
a3=-18


the common ratio musbe negative since the signs alternate

it is multiilied by 3 ach time

comon ratio is -3
an=-2(-3)^(n-1)