Question

Find the next three terms in the geometric sequence -3, 9, -27, 81, ...

Answer 1

...-243, 729, -2187

Explanation:

-3, 9, -27, 81, -243, 729, -2187

Everytime ×(-3)

-3×(-3)=9

9×(-3)=-27

-27×(-3)=81

Etc.

Answer 2

-243, 729, -2,187, r= -3