Are these Geometric, Arithmetic, Or Neither ?

Question

i ) 2, 8, 32, 128 ...

ii ) 4, 0, -4, 8 ...

iii ) 4, 6, 8, 12, -18 ...

iv ) 2, 4, 8, 16, 32 ...

 

 

- K

Answer 1

You can do this yourself, based on the following KNOWLEDGE:

 

If a sequence is geometric, then there's a constant factor that can be used to multiply any term to produce the successor term.

 

A sequence is arithmetic if there's a constant (positive or negative) that is added to a term to obtain the next term.