Question

What are the next three terms of the sequence 1, -3, 9, -27

Answer 1

Each term is the previous term × -3
-27 × -3 = 81
81 × -3 = -243
-243 × 3 = 729

Answer 2

by looking at the equation, the pattern is \[(-3)^{n}\] where n=(0,1,2,3,......)
so, the next 3 terms will be \[(-3)^{4}=81\]\[(-3)^{5}=-243\]\[(-3)^{6}=729\]

Answer 3

I would have come up with the same as @shrinifores