SOLUTION: What is the continues pattern for these numbers. 3, -6, 12, 4, 20, ?

Question 1126579: What is the continues pattern for these numbers. 3, -6, 12, 4, 20, ?
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Arithmetic Sequence
definition of nth term:
,....,....,.....,.....,-----------------
-- ...............--------------------
.................----------------------
........... .....------------------------
............. --------------------------
Differences didn't converge, there is

; so, it is not Arithmetic Sequence
,....,....,.....,.....
Geometric Sequence
definition of nth term:
find out if there is common ratio:
and

check second and third term
and

since not equal, there is

since your sequence is neither arithmetic nor geometric sequence, there is no way to find next term

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