Find a pattern for each sequence. Use the pattern to identify the next two terms or figures.?

Question

1. 3, -6, 18, -72, 360

-500; 10,600

-2,160; 15,120

-4,320; 20,113

2,160; 15,120

could someone please help me with this problem? i dont understand it? I been looking at this probelm for the past 20 min and cant figure it out. Is there like a special way to do it? please help please!

Answer 1

It looks like you are just multiplying the last number by what spot the next number will be in and flip the sign on each one. So, the second number (-6) is in the second spot, so you multiply the previous number (3) by this spot and flip the sign to get -6. So the answer is the second one, (-2160 and 15120)