Question

-3,9,-27,81,...

what is the pattern and the next 2 numbers??

Answer 1

If you break them up into their prime numbers the pattern is easy to see.

Answer 2

-3 = -1 * 3
9 = -1 * -1 * 3 * 3
-27 = -1 * -1 * -1 * 3 * 3 * 3
81 = -1 * -1 * -1 * -1 * 3 * 3 * 3 * 3