Which answers are geometric sequences?
There is more than one correct answer. Select all that apply.
{108, 36, 12, 4, ...}
{2.5, 4,5.5, 7, ...}
{0, 10, 20, 30,...}
O{-13, -6, 1,8,...}
{1,-1,1,-1,1,...}
{2, -10,50, -250, ...}